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走近科学英文作文Science is amazing. It allows us to explore the world around us and understand how things work. It's like anever-ending adventure, full of surprises and discoveries.When I think about science, I think about curiosity.It's that burning desire to know more, to ask questions, and to seek answers. Science is all about asking "why" and "how." It's about never settling for the status quo and always pushing the boundaries of our knowledge.Science is also about experimentation. It's abouttrying things out, making mistakes, and learning from them. It's about being open to new ideas and being willing to change our minds when the evidence tells us to. Science is not about being right all the time, but about constantly striving for a better understanding of the world.One of the things I love most about science is its ability to bring people together. Scientists from all overthe world collaborate and share their findings, regardlessof their nationality or background. It's a truly global endeavor that transcends borders and unites us in our quest for knowledge.Science is also about making a difference. It's about using our knowledge and understanding to solve problems and improve lives. Whether it's finding a cure for a disease, developing new technologies, or addressing environmental issues, science has the power to change the world for the better.But science is not just about the big discoveries and breakthroughs. It's also about the small everyday wonders that often go unnoticed. It's about the beauty of a sunset, the complexity of a snowflake, or the intricacy of a flower. Science helps us appreciate the world around us and see the magic in the seemingly ordinary.In conclusion, science is a fascinating and ever-evolving field that fuels our curiosity, encourages experimentation, brings people together, and has thepotential to make a real difference in the world. It's a journey of discovery and wonder, and I'm grateful to be a part of it.。
小学英语科普类阅读材料范文Dive into the fascinating world of science with our engaging elementary English reading material! Imagine stepping into a magical realm where the tiniest of creatures hold the secrets to the universe, and the vast cosmos whispers stories of the stars. This is the adventure that awaits you in our carefully curated collection of science readings designed to ignite curiosity and foster a love for learning.Embark on a journey through the colorful rainforests, where the vibrant flora and fauna come alive with each turn of the page. Discover the intricate dance of the food chain, where every creature plays a crucial role in maintaining the delicate balance of life. Marvel at the ingenuity of the beaver as it builds its complex dams, or the industriousness of the ants as they work tirelessly to support their colony.Then, let's soar to the skies and beyond, as we explore the mysteries of space. Learn about the life cycle of stars, from their fiery births to their dramatic supernova explosions. Uncover the secrets of the planets in our solar system, each with its own unique characteristics and captivating stories. Did you know that Jupiter is the largest planet, with a Great Red Spot that's a storm larger than Earth itself?But our exploration doesn't stop there. Delve into theworld of technology and witness the marvels of human innovation. From the first wheel to the latest advancementsin robotics, science has always been at the forefront of progress. Understand how electricity powers our world, andhow the simple magnet can revolutionize the way we thinkabout energy.Each reading is crafted with simplicity and clarity, ensuring that even the youngest of minds can grasp complex concepts with ease. Engaging illustrations accompany the text, bringing the wonders of science to life in a way that is both educational and entertaining.So, are you ready to embark on this extraordinary voyageof discovery? Grab your thinking caps, and let's set sail for the horizons of knowledge, where every question is aninvitation to explore, and every answer is a stepping stoneto a brighter future. Welcome to the world of elementary English science reading materials, where learning is an adventure waiting to happen!。
科学创新科普小作文英语Science and Innovation in Popular Science。
Science and innovation are two of the most important aspects of modern society. They have changed the way we live, work, and interact with one another. Science and innovation are the driving forces behind many of theworld's most important advancements, from the development of life-saving medicines to the creation of new technologies that make our lives easier and more enjoyable.Science is the study of the natural world, and it is the foundation upon which all other fields of study are built. It is the process of observing, experimenting, and analyzing data in order to better understand the world around us. Innovation, on the other hand, is the process of taking what we have learned through science and using it to create new products, processes, and technologies that can improve our lives.One of the most important aspects of science and innovation is their ability to improve our health.Scientists and innovators have developed life-saving medicines, vaccines, and medical technologies that have helped to improve the health and well-being of people all over the world. They have also developed new technologies that make it easier for doctors and researchers to diagnose and treat diseases.Another important aspect of science and innovation is their ability to improve our environment. Scientists and innovators have developed new technologies that can help us to reduce our carbon footprint, conserve energy, andprotect our natural resources. They have also developed new technologies that can help us to clean up our air and water, and protect our wildlife and ecosystems.Finally, science and innovation are also important for economic growth. Innovation drives economic growth by creating new jobs, new industries, and new products thatcan help to boost the economy. Science also plays an important role in economic growth by providing theknowledge and technology that businesses need to develop new products and services.In conclusion, science and innovation are two of the most important aspects of modern society. They have the power to improve our health, protect our environment, and drive economic growth. As a society, we must continue to invest in science and innovation in order to ensure that we are able to meet the challenges of the future and continue to improve our lives.。
关于科普科技的英语作文Science and Technology: Shaping Our FuturesScience and technology have become integral parts of our daily lives, transforming the way we live, work, and interact with the world around us. From the smartphones in our pockets to the advanced medical treatments that save lives, the advancements in science and technology have had a profound impact on our society. As we continue to push the boundaries of human knowledge and innovation, it is essential to understand the far-reaching implications of these developments and their role in shaping our collective future.One of the most significant impacts of science and technology is the way it has revolutionized our access to information and communication. The internet, for example, has become a global network that connects people from all corners of the world, enabling the instant sharing of knowledge, ideas, and experiences. This has led to a democratization of information, empowering individuals to seek out and engage with a vast array of knowledge resources, breaking down barriers to education and fostering a more informed and connected global community.Furthermore, the rapid advancements in digital technologies, such as artificial intelligence, machine learning, and big data analytics, have transformed the way we approach problem-solving and decision-making. These tools have the potential to streamline and optimize various processes, from healthcare diagnostics to urban planning, allowing us to make more informed and data-driven decisions. As these technologies continue to evolve, we must consider the ethical implications and ensure that they are developed and deployed in a responsible and inclusive manner, without exacerbating societal inequalities or undermining individual privacy and autonomy.Another crucial aspect of science and technology is its role in addressing the pressing global challenges we face, such as climate change, food security, and sustainable energy production. Through the development of renewable energy sources, innovative agricultural practices, and advanced materials, scientists and engineers are working to find sustainable solutions that can mitigate the impact of human activity on the environment. These efforts have the potential to not only safeguard our planet but also to create new economic opportunities and foster a more sustainable future for generations to come.In the field of healthcare, the advancements in medical research, biotechnology, and diagnostic tools have revolutionized the way we approach disease prevention, treatment, and personalized medicine.With the ability to map the human genome and develop targeted therapies, healthcare professionals can now provide more effective and tailored interventions, leading to improved patient outcomes and a better quality of life for those facing health challenges.However, as science and technology continue to advance, we must also address the potential risks and unintended consequences that may arise. Cybersecurity threats, the impacts of automation on employment, and the ethical considerations surrounding emerging technologies, such as genetic engineering and autonomous systems, are just a few examples of the complex issues that require careful examination and policymaking.To harness the full potential of science and technology, it is crucial that we cultivate a well-educated and scientifically literate population. This involves investing in STEM (Science, Technology, Engineering, and Mathematics) education, promoting scientific literacy, and fostering a culture of critical thinking and scientific inquiry. By empowering individuals to understand and engage with scientific concepts, we can ensure that the decisions and policies that shape our future are informed by a deeper appreciation for the role of science and technology.In conclusion, the advancements in science and technology have profoundly transformed our world, shaping our lives in countlessways. As we continue to push the boundaries of human knowledge and innovation, it is essential that we approach these developments with a sense of responsibility, ethical consideration, and a deep commitment to using technology to create a better future for all. By embracing the power of science and technology while addressing the challenges they present, we can harness their potential to tackle global problems, improve the human condition, and pave the way for a more sustainable and prosperous future.。
英文原版阅读科普类作文Title: The Fascinating World of Quantum Mechanics。
Quantum mechanics, the branch of physics that deals with the behavior of particles at the smallest scales, is a captivating field that challenges our understanding of the universe. From the bizarre behavior of particles to the potential implications for technology and philosophy, exploring quantum mechanics opens doors to a world of wonder and complexity.At the heart of quantum mechanics lies the concept of superposition. Unlike classical physics, where objectsexist in definite states, quantum particles such as electrons and photons can exist in multiple states simultaneously. This phenomenon is exemplified by the famous thought experiment of Schrödinger's cat, where a cat in a box is both alive and dead until observed, representing the superposition of states.Another fundamental aspect of quantum mechanics is wave-particle duality. This principle suggests that particles such as electrons exhibit both wave-like and particle-like properties. For instance, in the double-slit experiment, electrons behave like waves when not observed, creating an interference pattern, but act like particles when observed, resulting in discrete impacts on the detector screen.Entanglement is yet another mind-boggling concept in quantum mechanics. When two particles become entangled, their properties become correlated, regardless of the distance between them. This phenomenon, famously referred to as "spooky action at a distance" by Einstein, has been experimentally verified and forms the basis of quantum teleportation and quantum cryptography.The uncertainty principle, formulated by Werner Heisenberg, asserts that it is impossible to simultaneously know both the position and momentum of a particle with absolute precision. This fundamental limit to measurement precision has profound implications for our understandingof the microscopic world and underpins the probabilistic nature of quantum mechanics.Quantum mechanics also plays a crucial role in modern technology. Quantum computing, for example, leverages the principles of superposition and entanglement to perform complex calculations exponentially faster than classical computers. Additionally, quantum cryptography promises secure communication channels through the principles of quantum uncertainty and entanglement.Moreover, quantum mechanics has deep philosophical implications. It challenges our classical intuitions about reality, raising questions about the nature of observation, determinism, and the role of consciousness in shaping reality. The famous quote by physicist Niels Bohr, "Anyone who is not shocked by quantum theory has not understood it," underscores the profound implications of quantum mechanics for our worldview.In conclusion, quantum mechanics stands as one of the most profound and mysterious theories in modern science.Its principles challenge our classical understanding of the universe, while its potential applications offertantalizing possibilities for the future of technology. Exploring the intricacies of quantum mechanics not only deepens our understanding of the natural world but also sparks awe and wonder at the richness of the cosmos.。
高考英语说明文4篇1Here is an astonishing and significant fact: Mental work alone can’t makeus tire. It sounds absurd/əb'sɜːd/荒谬的. But a years ago, scientists tried to find out how long the human brain could labor without reaching a stage 阶段of fatigue /fə'tiːg/(疲劳). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we tooka drop of blood from a day laborer劳动者, we would find it fullof fatigue toxins /'tɒksɪn/ (毒素) and fatigue products. But if wetook blood from the brain of an Albert Einstein, it would show nofatigue toxins at the end of the day.So far as the brain is concerned, it can work as well and swiftly很快地at the end of eight or even twelve hours of effort as at the beginning. The brain istotally tireless. So what makes us tired?Some scientists declare that most of our fatigue comes from our mental and emotional(情绪的) attitudes. One of England’s most outstanding scientists, J.A. Hadfield, says, “The greater part of the fatigue from which we suffer is of mental origin /'ɒrɪdʒɪn/起源. In fact, fatigue of purely physical origin is rare.”Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of sitting worker in good health is due to emotional problems.”What kinds of emotions make sitting workers tired? Joy? Satisfaction?No! A feeling of being bored, anger, anxiety/æŋ'zaɪətɪ/焦虑, tenseness紧张, worry, a feeling of not being appreciated---those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.1. What surprised the scientists a few years ago?A. Fatigue toxins could hardly be found in a laborer’s blood.B. Albert Einstein didn’t feel worn after a day’s work.C. The brain could work for many hours without fatigue.D. A mental worker’s blood was filled with fatigue toxins.2. According to the author, which of the following can make sitting workers tired?A. Challenging mental work.B. Unpleasant emotions.C. Endless tasks.D. Physical labo3. What’s the author’s attitude towards the scientists’ idea?A. He agrees with them.B. He doubts them.C. He argues against them.D. He hesitates to accept them.4. We can infer from the passage that in order to stay energetic, sitting workers need to ________.A. have some good food.B. enjoy their workC. exercise regularlyD. discover fatigue toxins2They baby is just one day old and has not yet left hospital. She is quietbut alert /ə'lɜːt/（警觉）. Twenty centimeters厘from her face researchershave placed a white card with two black spots on it. She stares at it carefully.A researcher removes the card and replaces it by another, this time with the spots differently spaced. As the cards change from one to the other, her gaze（凝视）starts to lose its focus — until a third, with three black spots,is presented. Her gaze returns: she looks at it for twice as long as she did at the previous card. Can she tell that the number two is different from three, just 24 hours after coming into the world?Or do newborns simply prefer more to fewer? The same experiment, but with three spots shown before two, shows the same return of interest when the number of spots changes. Perhaps it is just the newness 名，新奇? When slightly older babies were shown cards with pictures of objects (a comb, a key, an orange and so on), changing the number of objects had an effect separate from changing the objects themselves. Could it be the pattern that two things make, as opposed to three? No again. Babies paid more attention to squares moving randomly on a screen when their number changed from two to three,or three to two. The effect even crosses between senses. Babies who were repeatedly shown two spots became more excited when they then heard three drumbeats than when they heard just two; likewise （同样地）when the researchers started with drumbeats and moved to spots.5. The experiment described in Paragraph 1 is related to the baby’s__.A. sense of hearingB. sense of sightC. sense of touch D sense of smell6. Babies are sensitive to the change in______.A. the size of cardsB. the colour of picturesC. the shape of patternsD. the number of objects7. Why did the researchers test the babies with drumbeats?A. To reduce the difficulty of the experiment.B. To see howbabies recognize sounds.C. To carry their experiment further.D. To keep the babies’interest.8. Where does this text probably come from?A. Science fiction.B. Children’s literature.C. An advertisement.D.A science report3Last night’s meteor(流星) 英/'miːtɪə/ shower left many people in the community dissatisfied and demanding 苛求的；要求高的；吃力的answers. According to Gabe Rothsclild, Emerald Valley’s mayor市长, people gathered in thesuburbs /'sʌbɜːb/of the city, carrying heavy telescopes, expecting to watch the brightly burning meteors passing through the sky. What they found instead was a sky so brightene by the city’s lights that it darkened the light of the meteors passing overhead. “My family was so frustrated,” admitted town resident Duane Cosby, “We wanted to make this an unforgettable family outing, but it turned out to be a huge disappointments.”Astronomers- /ə'strɒnəmə/n. 天文学家--scientists who study stars and planets---- have beencomplaining about this problem for decades. They say that light pollution prevents them from seeing objects in the sky that they could see quite easily in the past. They call on people and the government to take measures to fightagainst it.There is yet a population besides professional and amateur /ˈæmətə(r)/美 /'æmə.tʃʊr/n. 爱好者star observers that suffers even more from light pollution. This population consists of birds, bats frogs, snakes, etc. For example, outdoor lighting severely affects migrating(迁徙的)birds. According to the International Dark-Sky Association. “100million birds a year throughout North America die in crashes 撞碎with lighted buildings and towers.”Countless more animals casualties(伤亡）result from the use of artificial lighting. Clearly, people enjoy the benefits of lighting their evenings, but some scientists think it can be harmful for humans, too. They worry that exposure to light while sleeping can increase pers on’s chances of getting cancer. Emerald Valley is only one community that is becoming aware of the negative effects of light pollution. For years, Flagstaff, Arizona/,æri'zəunə/美 /,æri'zəunə/n. 美国亚利桑那州, has enforced lighting regulations in its city in order to assist astronomers at the Lowell Observatory.英 /əb'zɜːvət(ə)rɪ/美 /əb'zɝvətɔri/n. 天文台；气象台；瞭望台Similar efforts have been made worldwide, and a movement isunderway 进行中的to remind us to turn off lights when we are not using them, so thatother creatures can share the night.9.It happened last night thatA. the city’s lights affected the meteor watchingB. the meteors flew past before being noticedC. the city light show attracted many peopleD. the meteor watching ended up a social outing10. What do the astronomers complain about?A. Meteor showers occur less often than beforeB. Their observation equipment is in poor repairC. Light pollution has remained unsolved for yearsD. Their eyesight is failing due to artificial lighting11. What the author concerned about according to Paragraph 4?A. Birds may take other migration pathsB. Animals living habits may changesuddenlyC. Varieties of animals will become sharplyreducedD. Animals’ survival is threatened byoutdoor lighting12. Lighting regulations in Flagstaff, Arizona areput into effect toA. Lessen the chance of getting cancerB. create an ideal observation conditionC. ensure citizens a good sleep at nightD. enable all creatures to live in harmony13.What message does the author most want to give us?A. Saving wildlife is saving ourselvesB. Great efforts should be made to save energyC. Human activities should be environmentally friendlyD. New equipment should be introduced for space study4Almost every machine with moving parts has wheels, yet no one knows exactly when the first wheel was invented or what it was used for. We do know，however，that they existed over 5,500years ago in ancient Asia.The oldest known transport wheel was discovered in 2002 in Slovenia. It is over 5，100 years old. Evidence suggests thatwheels for transport didn't become popular for .while, though . This could be because animals did a perfectly good job of carryingfarming tools and humans around.But it could also be because of a difficult situation. While wheels need to roll on smooth surfaces, roads with smooth surfaces weren't going to be constructed until there was plenty of demand for them. Eventually, road surfaces did become smoother, but this difficult situation appeared again a few centuries later. There had been no important changes in wheel and vehicle design before the arrival of modern road design.In the mid-1700s,a Frenchman came up with a new design of road--a base layer (层)of large stones covered with a thin layer of smaller stones. A Scotsman苏格兰人improved on this design in the 1820s and a strong, lasting road surface became a reality. At around the same time, metal hubs英 /hʌb/美 /hʌb/n. 中心；毂；木片(the central part of a wheel)、came into being, followed by the Wheels were invented in 1967, sixty years after the appearance of tarmacked roads(泊油路). As wheel design took off,vehicles got faster and faster.14. What might explain why transport wheels didn’t become popular for some time?A. Few knew how to use transport wheels.B. Humans carried farming tools just aswell. C. Animals were a good means oftransport.D. The existence of transport wheels was not known.15. What do we know about road design from the passage?A. It was easier than wheel design.B. It improved after big changes in vehicle design.C. It was promoted by fast-moving vehicles.D. It provided conditions for wheel design to develop.16. How is the last paragraph mainly developed?A. By giving examples.B. By making comparisons.C.By following time order.D.By making classifications.17.What is the passage mainly about ?A.The beginning of road deaign.B.The development of transport wheel.C.The history of public transport.D.The invention of fast-moving vehicles.。
高考英语说明文4篇1Here is an astonishing and significant fact: Mental work alone can’t makeus tire. It sounds absurd/əb'sɜːd/荒谬的. But a years ago, scientists tried to find outhow long the human brain could labor without reaching a stage 阶段of fatigue /fə'tiːg/(疲劳). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we tooka drop of blood from a day laborer劳动者, we would find it full offatigue toxins /'tɒksɪn/ (毒素) and fatigue products. But if we tookblood from the brain of an Albert Einstein, it would show no fatiguetoxins at the end of the day.So far as the brain is concerned, it can work as well and swiftly很快地at the end of eight or even twelve hours of effort as at the beginning. The brain is totally tireless. So what makes us tired?Some scientists declare that most of our fatigue comes from our mentaland emotional(情绪的) attitudes. One of England’s most outstanding scientists, J.A. Hadfield, says, “The greater part of the fatigue from which wesuffer is of mental origin /'ɒrɪdʒɪn/起源. In fact, fatigue of purely physical origin is rare.”Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of sitting worker in good health is due to emotional problems.”What kinds of emotions make sitting workers tired? Joy? Satisfaction?No! A feeling of being bored, anger, anxiety/æŋ'zaɪətɪ/焦虑, tenseness紧张, worry, a feeling of not being appreciated---those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.1. What surprised the scientists a few years ago?A. Fatigue toxins could hardly be found in a laborer’s blood.B. Albert Einstein didn’t feel worn after a day’s work.C. The brain could work for many hours without fatigue.D. A mental worker’s blood was filled with fatigue toxins.2. According to the author, which of the following can make sitting workers tired?A. Challenging mental work.B. Unpleasant emotions.C. Endless tasks.D. Physical labo3. What’s the author’s attitude towards the scientists’ idea?A. He agrees with them.B. He doubts them.C. He argues against them.D. He hesitates to accept them.4. We can infer from the passage that in order to stay energetic, sitting workers need to ________.A. have some good food.B. enjoy their workC. exercise regularlyD. discover fatigue toxins2They baby is just one day old and has not yet left hospital. She is quietbut alert /ə'lɜːt/（警觉）. Twenty centimeters厘from her face researchers have placed a white card with two black spots on it. She stares at it carefully.A researcher removes the card and replaces it by another, this time with the spots differently spaced. As the cards change from one to the other, hergaze（凝视）starts to lose its focus — until a third, with three black spots,is presented. Her gaze returns: she looks at it for twice as long as she did atthe previous card. Can she tell that the number two is different from three,just 24 hours after coming into the world?Or do newborns simply prefer more to fewer? The same experiment, butwith three spots shown before two, shows the same return of interest whenthe number of spots changes. Perhaps it is just the newness 名，新奇? When slightly older babies were shown cards with pictures of objects (a comb, a key, an orange and so on), changing the number of objects had an effect separate from changing the objects themselves. Could it be the pattern that two things make, as opposed to three? No again. Babies paid more attention to squares moving randomly on a screen when their number changed from two to three,or three to two. The effect even crosses between senses. Babies who were repeatedly shown two spots became more excited when they then heard three drumbeats than when they heard just two; likewise （同样地）when the researchers started with drumbeats and moved to spots.5. The experiment described in Paragraph 1 is related to the baby’s__.A. sense of hearingB. sense of sightC. sense of touch D sense of smell6. Babies are sensitive to the change in______.A. the size of cardsB. the colour of picturesC. the shape of patternsD. the number of objects7. Why did the researchers test the babies with drumbeats?A. To reduce the difficulty of the experiment.B. To see howbabies recognize sounds.C. To carry their experiment further.D. To keep the babies’interest.8. Where does this text probably come from?A. Science fiction.B. Children’s literature.C. An advertisement.D.A science report3Last night’s meteor(流星) 英/'miːtɪə/ shower left many people in the community dissatisfied and demanding 苛求的；要求高的；吃力的answers. According to Gabe Rothsclild, Emerald Valley’s mayor市长, people gathered in the suburbs /'sʌbɜːb/ of the city, carrying heavy telescopes, expecting to watch the brightly burning meteors passing through the sky. What they found instead was a sky so brighteneby the city’s lights that it darkened the light of the meteors passing overhead.“My family was so frustrated,” admitted town resident Duane Cosby, “We wanted to make this an unforgettable family outing, but it turned out to be ahuge disappointments.”Astronomers- /ə'strɒnəmə/n. 天文学家--scientists who study stars and planets----have beencomplaining about this problem for decades. They say that light pollution prevents them from seeing objects in the sky that they could see quite easily in the past. They call on people and the government to take measures to fight against it.There is yet a population besides professional and amateur /ˈæmətə(r)/美 /'æmə.tʃʊr/n. 爱好者star observers that suffers even more from light pollution. This population consists of birds, bats frogs, snakes, etc. For example, outdoor lighting severely affects migrating(迁徙的)birds. According to the International Dark-Sky Association. “100million birds a year throughoutNorth America die in crashes 撞碎with lighted buildings and towers.”Countless more animals casualties(伤亡）result from the use of artificial lighting. Clearly, people enjoy the benefits of lighting their evenings, butsome scientists think it can be harmful for humans, too. They worry that exposure to light while sleeping can increase pers on’s chances of getting cancer. Emerald Valley is only one community that is becoming aware of the negative effects of light pollution. For years, Flagstaff, Arizona/,æri'zəunə/美 /,æri'zəunə/n. 美国亚利桑那州, has enforced lighting regulations in its city in order to assist astronomers at the Lowell Observatory.英 /əb'zɜːvət(ə)rɪ/美 /əb'zɝvətɔri/n. 天文台；气象台；瞭望台Similar efforts have been made worldwide, and a movement is underway 进行中的to remind us to turn off lights when we are not using them, so that other creatures can share the night.9.It happened last night thatA. the city’s lights affected the meteor watchingB. the meteors flew past before being noticedC. the city light show attracted many peopleD. the meteor watching ended up a social outing10. What do the astronomers complain about?A. Meteor showers occur less often than beforeB. Their observation equipment is in poor repairC. Light pollution has remained unsolved for yearsD. Their eyesight is failing due to artificial lighting11. What the author concerned about according to Paragraph 4?A. Birds may take other migration pathsB. Animals living habits may changesuddenlyC. Varieties of animals will become sharplyreducedD. Animals’ survival is threatened by outdoorlighting12. Lighting regulations in Flagstaff, Arizona areput into effect toA. Lessen the chance of getting cancerB. create an ideal observation conditionC. ensure citizens a good sleep at nightD. enable all creatures to live in harmony13.What message does the author most want to give us?A. Saving wildlife is saving ourselvesB. Great efforts should be made to save energyC. Human activities should be environmentally friendlyD. New equipment should be introduced for space study4Almost every machine with moving parts has wheels, yet no one knows exactly when the first wheel was invented or what it was used for. We do know，however，that they existed over 5,500years ago in ancient Asia.The oldest known transport wheel was discovered in 2002 in Slovenia. It is over 5，100 years old. Evidence suggests thatwheels for transport didn't become popular for .while, though . Thiscould be because animals did a perfectly good job of carryingfarming tools and humans around.But it could also be because of a difficult situation. While wheels need to roll on smooth surfaces, roads with smooth surfacesweren't going to be constructed until there was plenty of demandfor them. Eventually, road surfaces did become smoother, but this difficult situation appeared again a few centuries later. There hadbeen no important changes in wheel and vehicle design before thearrival of modern road design.In the mid-1700s,a Frenchman came up with a new design ofroad--a base layer (层)of large stones covered with a thin layer ofsmaller stones. A Scotsman苏格兰人improved on this design in the 1820s and a strong, lasting road surface became a reality. At around thesame time, metal hubs英 /hʌb/美 /hʌb/n. 中心；毂；木片(the central part of a wheel)、came into being, followed by the Wheels were invented in 1967, sixty years after the appearance of tarmacked roads(泊油路). As wheel design took off, vehicles got faster and faster.14. What might explain why transport wheels didn’t become popular for some time?A. Few knew how to use transport wheels.B. Humans carried farming tools just as well.C. Animals were a good means of transport.D. The existence of transport wheels was not known.15. What do we know about road design from the passage?A. It was easier than wheel design.B. It improved after big changes in vehicle design.C. It was promoted by fast-moving vehicles.D. It provided conditions for wheel design to develop.16. How is the last paragraph mainly developed?A. By giving examples.B. By making comparisons.C.By following time order.D.By making classifications.17.What is the passage mainly about ?A.The beginning of road deaign.B.The development of transport wheel.C.The history of public transport.D.The invention of fast-moving vehicles.。
走近科学英文作文Science is fascinating. It allows us to explore the world around us and understand how things work. From the smallest particles to the vastness of space, science encompasses it all. It is a never-ending quest for knowledge and discovery.In the world of science, experiments are key. They allow us to test hypotheses and gather data. Whether it's mixing chemicals in a lab or observing the behavior of animals in the wild, experiments provide us with valuable insights. They can be messy and unpredictable, but that's what makes them exciting.Observation is another important aspect of science. By carefully watching and documenting phenomena, scientists can uncover patterns and make connections. It's like being a detective, searching for clues and piecing together the puzzle. From observing the growth of plants to studying the movement of stars, observation is a powerful tool.Mathematics plays a crucial role in science. It provides us with a language to describe and quantify the natural world. From calculating the speed of a moving object to analyzing complex data sets, math helps us make sense of the universe. It may seem intimidating at times, but with practice, anyone can become proficient in mathematical reasoning.Technology has revolutionized the field of science. From microscopes to telescopes, from computers to DNA sequencing machines, technology has allowed us to see things that were once invisible and delve deeper into the mysteries of the universe. It has opened up new avenues of research and expanded our understanding of the world.Collaboration is key in the scientific community. Scientists from different disciplines come together to share their knowledge and expertise. They collaborate on research projects, exchange ideas, and challenge each other's assumptions. It's through this collective effort that scientific breakthroughs are made.Science is not just about facts and figures. It is also about curiosity and wonder. It encourages us to ask questions and seek answers. It pushes the boundaries of our knowledge and challenges our understanding of the world. It inspires us to dream big and imagine what is possible.In conclusion, science is a journey of exploration and discovery. It is a blend of experimentation, observation, mathematics, technology, collaboration, and curiosity. Itis a never-ending quest to understand the world around us and push the boundaries of human knowledge. So let's embrace the wonders of science and continue to walk closer towards it.。
关于科普类英语文章阅读科普类阅读文章是高考阅读中的一个重要方面,它涉及到最新科技、发明或应用,对于学生的语言基础知识和语言技能要求很高。
小编精心收集了关于科普类英语文章，供大家欣赏学习!关于科普类英语文章篇1人类祖先露西因何而死Lucy, the most famous fossil of a human ancestor, probably died after falling from a tree, according to a study appearing in Nature led by researchers at The University of Texas at Austin. Lucy, a 3.18-million-year-old specimen of Australopithecus afarensis -- or "southern ape of Afar" -- is among the oldest, most complete skeletons of any adult, erect-walking human ancestor. Since her discovery in the Afar region of Ethiopia in 1974 by Arizona State Universityanthropologist Donald Johanson and graduate student Tom Gray, Lucy -- a terrestrial biped -- has been at the center of a vigorous debate about whether this ancient species also spent time in the trees."It is ironic that the fossil at the center of a debate about the role of arborealism in human evolution likely died from injuries suffered from a fall out of a tree," said lead author John Kappelman, a UT Austin anthropology and geological sciences professor.Kappelman first studied Lucy during her U.S. museum tour in 2008, when the fossil detouredto the High-Resolution X-ray Computed Tomography Facility (UTCT) in the UT Jackson School of Geosciences -- a machine designed to scan through materials as solid as a rock and at a higher resolution than medical CT. For 10 days, Kappelman and geological sciences professor Richard Ketcham carefully scanned all of her 40-percent-completeskeleton to create a digital archive of more than 35,000 CT slices."Lucy is precious. There's only one Lucy, and you want to study her as much as possible," Ketcham said. "CT is nondestructive. So you can see what is inside, the internal details and arrangement of the internal bones."Studying Lucy and her scans, Kappelman noticed something unusual: The end of the right humerus was fractured in a manner not normally seen in fossils, preserving a series of sharp, clean breaks with tiny bone fragments and slivers still in place."This compressive fracture results when the hand hits the ground during a fall, impacting the elements of the shoulder against one another to create a unique signature on the humerus," said Kappelman, who consulted Dr. Stephen Pearce, an orthopedic surgeon at Austin Bone andJoint Clinic, using a modern human-scale, 3-D printed model of Lucy.Pearce confirmed: The injury was consistent with a four-part proximal humerus fracture, caused by a fall from considerable height when the conscious victim stretched out an arm in an attempt to break the fall.关于科普类英语文章篇2古生物学家发现大型霸王龙化石Paleontologists with the Burke Museum of Natural History and Culture and the University of Washington have discovered a Tyrannosaurus rex, including a very complete skull. The find, which paleontologists estimate to be about 20 percent of the animal, includes vertebrae, ribs,hips and lower jaw bones. The team, led by Burke Museum Adjunct Curator of Vertebrate Paleontology and UW biology professor Gregory P. Wilson, discovered the T. rex during an expedition to the Hell Creek Formation in northern Montana -- an area that is world-famousfor its fossil dinosaur sites. Two Burke Museum paleontology volunteers, Jason Love and Luke Tufts, initially discovered pieces of fossilized bone protruding from a rocky hillside. The bones' large size and honeycomb-like structure indicated they belonged to a carnivorous dinosaur. Upon further excavation, the team discovered the T. rex skull along with ribs, vertebrae, and parts of the jaw and pelvis.T. rex was one of the largest meat-eating dinosaurs to ever roam the Earth. Measuring an average of 40-feet long and 15 to 20-feet tall, T. rex was a fierce predator with serrated teeth and large jaws. Fossil evidence shows it ate other dinosaurs like Edmontosaurus and Triceratops, with crushed bones from the animals even showing up in the its fossilized poop. T. rex lived about 66-68 million years ago in forested river valleys in western North America during the late Cretaceous Period.The T. rex found by the Burke/UW team is nicknamed the "Tufts-Love Rex" in honor of the two volunteers who discovered it. The skull is about 4 feet long weighs about 2,500 pounds in its protective plaster jacket. Excavation in the field revealed the right side of the skull from base to snout, including teeth. Burke paleontologists believe it is very probable the other side of the skull is present, but will need to carefully remove the rock surrounding the fossil before they can determine its completeness."We think the Tufts-Love Rex is going to be an iconic specimen for the Burke Museum and the state of Washington and will be a must-see for dinosaur researchers as well," said Wilson.关于科普类英语文章篇3非洲草原上的大象数量大幅下降Paul G. Allen's Vulcan Inc. today announced the results of the $7 million, three-year Great Elephant Census (GEC - /), the first-ever pan-African survey of savanna elephants using standardized data collection and validationmethods. Managed by Elephants Without Borders (EWB,) the immense project's report confirms substantial declines in elephant numbers over just the last decade. The researchers report that the current rate of species decline is 8 percent per year, primarily due to poaching. The Pan-African survey shows the estimated savannah elephant population to be 352,271 within the 18 countries surveyed to-date, representing at least 93 percent of savannah elephants in these countries. For savannah elephant populations in 15 of the GEC countries, for which repeat counts were available, populations declined by 30 percent between 2007 and 2014. 84 percent of the population surveyed was sighted in legally protected areas compared to 16 percent in unprotected areas. However, large numbers of carcasses were observed in many protected areas indicating that elephants are struggling both within and outside of parks. Experts say the ivory trade and poaching pose serious threats and there is now a risk that savannah elephants could disappear from parts of Africa. The scientific report of the GEC findings was published on August 31, in the peer-reviewed open access journal PeerJ and is freely accessible at https:///articles/2354/The GEC team used the most accurate, up-to-date counting and statistical methods toanalyze data, accurately determining the number and distribution of the great majority of African savanna elephants and this now provides a baseline on a continental scale for future surveys and trend analyses, thatwildlife ecologists will be able to use to coordinateconservation efforts.Overall, 90 scientists, six non-governmental organization partners, and two advisorypartners, managed by a team at Paul Allen's Vulcan Inc. collaborated in the work. These included the organizations Elephants Without Borders, the Wildlife Conservation Society, the Nature Conservancy, Frankfurt Zoological Society, African Parks Network and the advisory groups Save the Elephants and the International Union for Conservation of Nature's African Elephant Specialist Group. The effort was conducted which partnered with in country park biologists,rangers, and game wardens.。
英文版的科技文章阅读许多科技工作者默默无闻地工作着，从不考虑个人得失，可谓宠辱不惊。
下面小编整理了英文版的科技文章阅读，希望大家喜欢!英文版的科技文章阅读摘抄苹果发布最新防监控系统补丁In many cases, the NSO Group had designed its tools to impersonate those of the Red Cross, Facebook, Federal Express, CNN, Al Jazeera, Google and even the Pokemon Company to gain the trust of its targets, according to the researchers.研究人员称，很多情况下，NSO集团把自己的工具设计得像红十字会(Red Cross)、Facebook、联邦快递(Federal Express)、CNN、半岛电视台(Al Jazeera)、谷歌(Google)，甚至宝可梦公司(Pokemon Company)的一样，以便获取目标的信任。
“NSO Group was very professional, and very effective in staying silent,” said Mike Murray, a vice president at Lookout.“NSO集团非常专业，在保持沉默方面也非常有效，”Lookout 的副总裁迈克•默里(Mike Murray)说。
In recent years, zero day flaws have been traded among hackers, brokers, companies like the NSO Group, and spy agencies and law enforcement networks eager for ways to break into devices.近年来，零日漏洞在黑客、中间商、NSO集团这样的公司，和迫切地想要破解设备的间谍机构与执法网络之间交易。
英语科普阅读材料双语——科技4篇（一）我们如何在28小时内到达火星？ (1)（二）饮水鸟蕴含的工程学原理 (9)（三）人们是否应该接受人造肉 (29)（四）为什么当代手机电池还是这么不经用 (40)（一）我们如何在28小时内到达火星？How Could We Get To Mars In Only 28 Hours?Everyone always wants to get to Mars.每个人都总是渴望去火星Unfortunately, the journey would be a long one,不幸的是依靠我们目前的技术taking hundreds of days of travel with our current technology.这趟旅途将会十分漫长长达几百天Well, what if we could shorten that time to only a matter of days试想如果我们不使用宇宙飞船by throwing away our spaceships而是用一些在太空中急速穿梭的东西and using something that’s already zooming acr oss space?这趟旅程可以缩短到几天？I’m talking about comets.我说的是彗星Comets are big ol’ cosmic snowballs,彗星是一个由冻结气体岩石和尘埃made from frozen gases, rock, and dust组成的巨大雪球that end up orbiting the Sun after the other planets当其他行星试图把彗星扔向地球tried throwing them at Earth and missed.但没成功时它们便围绕地球飞行Well, that last part probably isn’t true.当然最后那部分可能是假的Everyone knows that the planets only have water gun battles.我们都知道行星上只有水枪之战Not to mention, comets can actually be pretty big.更不必说彗星实际上可能非常大Frozen, you could probably liken them to about the size of a small town.这些雪球你可以把它们比做一个小镇那么大However, when these things get close to the Sun in their orbit,然而它们在自己的轨道环形并接近太阳时they can begin to heat up.会逐渐变热Then they start spewing dust and gases,接着喷涌出尘埃和气体forming a giant glowing head.形成一个巨大的发光脑袋Huh. I thought only I had that problem.哈我认为只有我有这个顾虑Luckily enough, if we want to use one of these things for stellar travel,幸运的是如果我们想用其中一个彗星进行星际旅行we have quite a few to choose from!我们的选择有很多！According to NASA,根据美国航天局there are around 3,600 comets that we currently know of.我们目前已知的彗星约有3600颗Beyond that, it’s believed that there are billions of other comets out there此外据说在遥远的柯伊伯带还有数十亿颗彗星orbiting our Sun in the Kuiper Belt and even more distant Oort Cloud. 甚至是更远的奥尔特云围绕着太阳运行的What makes comets great for getting around in space彗星能够穿梭星际is that they can go SUPER fast.是因为其速度极快Yeah, this baby can fly!是的这小东西会飞！How fast they’re travelling depends on a bunch of different factors,它们的速度取决于多种不同因素but they can travel anywhere from a few thousand kilometers per hour,但在一定条件下它们的速度可以从时速几千公里to over 160,000 kilometers per hour under certain conditions.达到每小时超16万公里在任何地方飞行In fact, in 2016, scientists at NASA recorded2016年美国航天局的科学家们记录了a comet traveling at nearly 600 kilometers per second as it dove toward the Sun.一颗秒速六百公里驶向太阳的彗星That’s over 2 /million/ kilometers per hour!那超过了两百万公里每小时！To put that in perspective,就此展望if we could travel at 2 million kilometers per hour,如果我们能以每小时两百万公里的速度飞行then wecould get to Mars from Earth in around 28 hours,我们可以在一天多的时间里just little more than a single day,约28小时就可以完成火星之旅assuming the two planets were close together in their orbits. 假设轨道上有两颗行星距离很近Lining up the planets is the least of our worries though.我们可以在可控范围内排列行星While comets can go super fast,彗星的速度超快getting to them would be a big problem.登上彗星仍会是一大问题That’s because, not even considering how hard it would be to actually commandeer one,因为我们甚至没有考虑控制一个彗星有多难comets just don’t typically get that close to Earth.彗星一般离地球很远Hale-Bopp, a comet that made the news about two decades ago, 大概二十年前新闻上报道了海尔-波普彗星came closer to Earth than most comets do,它比大多彗星更靠近地球and it was still about 200 million kilometers away.但还是有约两百万公里的距离We might as well just go straight to Mars at that point!照那样我们还不如直接去火星吧！Even if a comet did come by Earth,即使彗星确实经过地球we assume that its trajectory is towards Mars,我们也断定它的轨道是朝着火星的and we ignore that it would likely be in its more gassy, less-solid state,并且我们忽略了它可能更多的是气体而非固态物质you’d still have to keep yourself alive on the comet.你还要在彗星上生存下去I guess if it’s only a day or so then food and water would be less of an issue我猜如果只是一天左右那食物和水就不是问题了since the aliens would definitely feed you once we got there,因为一旦我们到了那里外星人肯定会伺候我们的but you’d still have to worry about oxygen and protecting your self from space.但你仍要担心氧气并且保护自己远离太空You would need about 0.84 kilograms of oxygen a day,你每天约需0.84公斤的氧气so you better grab a spacesuit and take a big breath before jumping on the comet.所以跳上彗星前你最好穿上宇航服深吸一口气So yeah, using comets as a means of space travel is probably not that viable in the end.所以利用彗星进行太空旅行或许并不可行Sometimes I like doing these thought experiments, you know,有时我喜欢做这些思维实验and then realizing that they can’t work.然后意识到不可能实现But it’s still interesting!仍然它仍很有趣！That’s how we learn people!这也是咱认识人类的方法！So do you have any questions about space that you want me to answer.你有关于太空的疑问想要我解答？Any planets that we should cover next?接下来我们要讲哪些行星？Let me know right now in the comment section below!请立刻在下方评论区告诉我吧！Curious to know what would happen if you were trapped on the international space station?我很好奇如果你被困在国际空间站会发生什么？We teamed up with our friend William Osman to answer that question.我们会与我们的朋友William Osman一起为你解答ISS actually gets its power from solar arrays made up of thousands of solar cells.国际空间站的能量来自上万个太阳能电池组成的阵列These arrays can efficiently covert solar energy into electrical power. 这些阵列可以有效地将太阳能转换成电能Typically producing more power than the station needs at one time. 通常在同一时间产生超出所需的电力（二）饮水鸟蕴含的工程学原理The Engineering of the Drinking BirdThis toy has fascinated me since childhood.我从小就对这个玩具着迷To me its motion is almost hypnotic.对我来说它的运动就像是催眠Here’s how it operates.它是这样运转的Wet the bird beak thoroughly with room temperature water.将鸟喙完全浸透在室温的水中The opaque container makes it looked chilled,不透明容器使它看起来冷淬了but it isn’t…其实并没有Then stand it upright…然后让它直立It will take a few seconds for it to start drinking…它要等几秒钟后才开始喝水Notice that all of the action right now takes place in the stem here 注意现在所有的运动都发生在躯干这里As l speed up the action当我快进这个过程you see liquid rising and the bird rocking back and forth.可以看见液面上升饮水鸟开始前后摇摆If I return to normal speed,如果调回常速播放you can see the bird slowly …可以看到饮水鸟慢慢地very, very slowly ….非常非常慢地Rock forward…向前摆动Until it takes a drink,直到它喝到了水which it will do again and again.然后一遍又一遍地重复此过程In this video I’ll detail the bird’s clever engineering design,在本视频中我将详述这只鸟精妙的工程设计explain how it uses thermodynamics,阐明它是如何运用热力学知识and link its action to some of the greatest将其运动与一些工程师创造的and most impactful devices created by engineers.伟大且影响深远的装置联系起来的This toy has long history,这个玩历史悠久but its current incarnation is due to Miles V. Sullivan—它的当前形态是由贝尔实验室一名科学家a scientist at Bell Labs.Miles V. Sullivan创造的He specialized in methods of manufacturing semiconductors,他专精于研究制造半导体的方法but as a sideline invented toys.发明玩具是他的副业Its reported that this bird delighted U.S. President Herbert Hoover,据说这只饮水鸟深得美国总统赫伯特·胡佛喜爱an engineer who failed to figure out how it worked,作为一名工程师他没搞懂它的工作原理and it also defeated the great scientist Albert Einstein,而且它还难倒了伟大的科学家艾尔伯特·爱因斯坦who spent three and half months studying it.爱因斯坦花了三个半月来研究它It’s reported that he refused to take the bird apart.据报道他拒绝把这只鸟拆开With the benefit of hindsight,有了后见之明let’s start by exploring how it works让我们从探索它的工作原理and examining the key engineering design aspects.以及检查关键的工程设计方面开始First, let’s ask is the water ornamental or essential?首先要问的是水是装饰品还是必需品？At first the bird acts just as if the water were still there.最初饮水鸟的行为好像水还在那里一样Now let’s speed up the bird’s motion我们快进饮水鸟的动作you see at 15 minutes it is still drinking.可以看见过了15分钟它仍在喝水At 30 still drinking.30分钟还在喝水45 minutes still drinking.45分钟依然还在喝水60 minutes still drinking.60分钟还在喝水75 minutes still drinking.75分钟仍然还在喝水And five or ten minutes later,又过了5到10分钟后at eighty or eight-five minutes it takes its last drink.约在80到85分钟它喝了最后一次水The liquid still rises a bit,虽然液面上升了一点but it never rises enough to make the bird tip over,但它从没上升到足够使鸟翻倒的高度which shows that the motion is not perpetual说明这个运动不是永恒的—as long as there is water, the bird keeps drinking.只要有水鸟就一直喝水Let’s look inside the bird来看看饮水鸟的内部to get an idea of how it works.了解它的工作原理Underneath the bird’s hat, beak and fabric covering lies a glass bulb 在鸟帽鸟嘴和织物覆盖物下面有一个玻璃泡smaller than the bulb at the base, and also rounder.它比底部的玻璃泡小也更圆Now, watch as I put a few drops of isopropyl alcohol on the bulb to cool it.现在我滴几滴异丙醇在玻璃泡上使它降温The liquid rapidly rises to the head,里面的液体快速上升到头部this changes the bird’s center of gravity这改变了饮水鸟的重心so that it will tilt forward.使它向前倾斜The head now fills with liquid and then …现在头部充满了液体接下来……there…你看…it …drinks.它喝水了It becomes upright and the liquid drains from the head.它直立后液体从头部排出Liquid rises again to the head and…液体再一次上升到头部……the bird drinks again.饮水鸟再一次喝水This cycle repeats until all of the isopropyl alcohol on the bird ’s head evaporates.这个过程循环往复直到鸟头上的异丙醇都蒸发掉Why does the liquid rise?为什么液面会上升呢？The place to begin is with the bird’s manufacture.我们从饮水鸟的制造说起The bird is filled through this “tap ”—a small pipe built into the head —通过装在头部里的小管子即龙头with methylene chloride dyed red, which is then frozen,向鸟内装入冷冻的染成红色的二氯甲烷a vacuum applied to evacuate the air,抽走空气形成真空the tap sealed ( and of course, later hidden by the bird’s hat )…把龙头密封(当然后来被鸟帽盖住了)And then the methylene chloride melts:之后二氯甲烷融化It turns to liquid and then some of it evaporates（turns into vapor）.转变为液态其中部分二氯甲烷蒸发(变成蒸汽)The key to the bird’s operation is饮水鸟运转的关键就在于that the vapor in the head and in the base are separated by the liquid in the base.头部和底部的气体被底部的液体所隔离It’s hard to see,这很难看清楚but the tube extends into the base, nearly reaching the bottom.不过管子延伸到底部几乎接触到底面This separates the vapor in base and the vapor in the tube使得底部和管中的气体隔离……and …of course, the head.当然还有头部的气体So, at rest the pressure in these two spaces are equal,在静止状态这两个空间的压强相等but when the bird’s beak is wet,但当鸟喙湿润时the temperature falls鸟喙温度下降and as I’ll explain in a moment the pressure in the head drops头部的压强下降这个我稍后会解释below that in the base and the liquid rises.降到低于底部的压强然后液面上升Of course this liquid in the head causes the bird to…tilt forward, to drink …自然头部的液体导致饮水鸟向前倾斜喝水and when it drinks,当它喝水时the vapor in the head and the base are connected,头部和底部的蒸汽连通the pressures is nearly equalize两端压强几乎相等—a slug of vapor rises to the top and some liquid drains from the head一股蒸汽上升到头部迫使部分液体流出and then the cycle repeats.然后循环重复To see the pressure equalize为了看到压强平衡过程l will slow down the bird as I tilt it forward.我会慢一点倾斜饮水鸟Right now the head is half full.现在头部已经半满了When I tilt it you see a slug of vapor go from bottom to top.当它倾斜时可以看见一股蒸汽从底部升到顶部I’ve tilted it far enough forward我把它倾斜得够多that the liquid in the head is below the top of the tube以至于头部的液面低于管子的顶端and the liquid in the base is below the section of the tube that almost reaches the bottom of the bird.同时底部液面也低于几乎触底的管子底端This allows the pressure to equalize,这样头部和底部的压强相等and as the bird becomes upright而当饮水鸟站起来时the liquid returns to the base before the cycle starts again.液体会在下一次循环开始之前返回到底部In operation it doesn’t tilt quite this far forward实际运转时它不会向前倾斜这么多and so the pressures don’t fully equalize.因此压强不会完全平衡Why, though, does the pressure in the head drop as the temperature falls?那么头部压强为何会随着温度下降而下降呢？You can see the answer if I shoot cool, compressed gas across the bird’s head.你看我向头部射低温压缩气体就知道答案了As the cool gas strikes,遇到低温气体时you see liquid condensing inside the head;头部内壁出现了冷凝的液体and, as you see on the left,正如你在左图看到的this causes the liquid in the base to rise.这导致底部的液面上升The cool gas withdraws energy as heat from the head,低温气体带走头部的热量causing some of the methylene chloride vapor inside to condense –to turn into a liquid.导致头部部分二氯甲烷气体冷凝成液体This decreases dramatically the amount of vapor in the head.这大大减少了头部的气体体积Liquid is 1,000 times more dense than vapor.液体的密度是气体的1000倍This in turn lowers the pressure in the head and causes the liquid to rise.结果降低了头部的压强使液面上升I used compressed gas to cool the head我用压缩气体给头部降温because I can control the amount of cooling;因为我可以控制降温的程度the bird, though, cools its head by “drinking.”然而饮水鸟通过喝水来降温The head is wrapped in fabric that absorbs water.其头部包裹在吸水的织物中As I put drops on its beak当我把水滴在鸟喙上you can see the water beads up at first…一开始你可以看到水珠……and then saturates the fabric and spreads rapidly across the bird’s face.然后水珠浸透织物并迅速扩散到鸟的整个面部On the right side you can see it creeping to back of the head.从右边看可以看到水渍浸到了后脑勺If I now turn the bird around,如果我现在把鸟转过来you can see that the water has spread to the back.可以看到水已经蔓延到后面As I continue adding drops on the beak如果我继续往鸟喙上滴水the saturated area on the back increases.头背处渗水区域扩大When this water evaporates into the air, it removes energy from the bulb as heat当水蒸发到空气中带走了头部的热量you feel this effect every time you step out of the shower,每次你洗完澡都会有这种感受the evaporating water withdraws energy as heat and chills you.蒸发的水带走热量让你感到冷飕飕的This evaporation, this withdrawal of heat, lowers the temperature 蒸发吸热降低了头部的温度and begins the condensation of the vapor, which starts the cycle 蒸汽冷凝启动循环as I showed you with the cool, compressed gas.就像我之前用低温压缩气体做的演示一样As long as the head is wet and heat is withdrawn from it,只要头部保持潮湿而且有热量带走the bird will always “drink, ”饮水鸟将一直“喝水”but if you were to operate the bird in humid air,但如果你把饮水鸟放在潮湿的环境it would slow down, because little water would evaporate,它就会减速喝水因为很少有水分蒸发and if the air were at 100 % humidity the bird would stop如果空气湿度是100% 饮水鸟将停止喝水because no water would evaporate at all.因为根本没有水蒸发Now, to make this dramatic condensation happen现在为了达到明显的冷凝效果when the temperature is lowered just slightly当温度只稍微降低时the evaporating water lowers the temperature by only about three-tenths of a degree水的蒸发只降低了0.3 度the bird’s designer choose a highly volatile liquid.饮水鸟的设计者选择了一种极易挥发的液体This means one whose boiling point is near ambient temperature这就需要这种液体的沸点接近室温because for small changes in temperature因为即使温度轻微变化there is a large change from vapor to liquid从气态至液态的变化也是巨大的and so the variation of pressure is large.从而引起压强的巨大变化Watch what happens as I “heat ”the base of the bird with my hand.观察我用手加热饮水鸟的底部时会怎么样You see the liquid level in the base dropping,可以看到底部的液面在下降that’s because energy from my hand is converting some of the liquid into vapor,这是由于手的热量使部分液体转化成气体which increases the pressure in this region…增大了这个区域的压强and that causes the liquid to rise to the head.从而使液体上升到头部Eventually I heat the vapor so much that it shoots up the stem.最终我把蒸汽加热到从管子中冒出来Now watch as I place my hand around the head.现在看我把手放在头部Heat from my hand converts liquid to vapor,手上的热量将液体转化为蒸汽which increases the pressure从而增大了压强and forces the liquid back to the base.并迫使液体回到底部To test this explanation of the bird’s operation,为了验证这个饮水鸟运转的解释let’s activate the bird in different ways.让我们用不同方式来触发饮水鸟As I noted it is the temperature difference between its top and bottom我说过是它顶部和底部的温差that drives liquid to rise to the head.驱使液体上升至头部So, let’s see what happens if I point a light at the base of the bird,那么我们看看对底部进行光照会怎么样which I’ve painted black我把饮水鸟的底部涂成了黑色so it will absorb the energy from the light better.这样它能更好地吸收光能As I heat the base of the bird,当我给饮水鸟底部加热时the liquid rises, as before but …液体像之前一样上升但是……五倍速播放the bird tips backwards.饮水鸟向后倾斜The wet nose tilted the center of gravity……湿润的鼻子倾斜了饮水鸟的重心……and so I added some modelling clay to the nose于是我在鸟鼻子上加了些粘土to get the bird to tilt forward.好让鸟向前倾斜And now when I turn on the light the liquid rises,现在当我打开灯光液体上升the birds drinks as if there were liquid in front of it until…鸟儿就像面前有水一样喝水直到……I turn the light off我把灯关掉and the bird drinks for a little bit longer until eventually…这只鸟再坚持了一会儿直到最终……it comes to rest.它停了下来Next, let’s see what happens if we use this: Whiskey.接下来让我们看看用这个会怎么样：威士忌Again, thoroughly wet the bird’s beak with the liquid…再次用液体浸润鸟喙……stand it upright …让它直立……and then we see again the liquid rising in the bird …然后我们又看到饮水鸟体内的液面上升and then …it drinks.然后……它在喝水We can also now understand why the bird’s rate of drinking differs 我们现在也能理解在三种不同的刺激下among the three methods I used to “activate ”the bird:为什么饮水鸟的喝水频率不同了a heat lamp, whiskey and water.加热灯威士忌和水三种刺激Roughly, heat bird takes three drinks for every one of the water bird,大致上饮水鸟每喝一次水受热鸟喝三次the whiskey bird takes two for every drink of the water bird.而饮水鸟每喝一次饮酒鸟喝两次The reason the bird drinks whiskey faster than water is之所以饮酒鸟比饮水鸟快because the rate of evaporation of the alcohol is greater than that of water.是因为相对于水酒精更易挥发This means that heat is withdrawn faster from the head也就是说头部的热量散失更快and so more vapor condenses in a shorter amount of time,短时间内冷凝的蒸气更多which accelerates the pressure difference.从而加速扩大压差The heat lamp causes the greatest difference of all,加热灯导致的压差最大which highlights how an engineer thinks about this bird.这重点表明了工程师对饮水鸟的想法To an engineer this bird is a heat engine.对工程师来说饮水鸟是一个热机A heat engine turns heat differences into work —mechanical motion.热机将热能转化为功——机械运动To see that recall that when the bird is just about to drink回想一下当鸟正要喝水时that its head is at a lower temperature than its base,它的头部温度比底部的低which is at ambient temperature.底部温度就是环境温度Then when it “drinks ”, the pressure in the head and base start to equalize,当它“喝水”时头部和底部的压强开始平衡so liquid returns to the base,于是液体回到底部but the overall temperature of the bird但是现在饮水鸟的整体温度is now just a little below ambient temperature.只是稍低于环境温度When it return to upright, the base draws in energy as heat…当它恢复直立时底部吸热……the head then rejects some energy as heat头部放热and the bird drinks again.然后饮水鸟再次喝水These two flows define a heat engine:这种热传递定义了热机：a device, operating in a cycle一种循环运行的装置that absorbs heat from a high temperature reservoir,从高温热源处吸热converts part of it into work,将部分热能转化为功and rejects the remainder into a low temperature reservoir.向低温热源放热The fact that this is a heat engine饮水鸟就是热机这一事实means it’s related to the great machines that make our globalized world happen:表明它跟实现全球化的许多伟大机器有关among those the mighty steam turbine that generates electricity,其中有能发电的大型蒸汽轮机the giant diesel engine that propels container ships across the oceans,推动货轮穿越海洋的大型柴油机and the great gas turbine that flies us around the globe.还有让我们飞遍全球的燃气轮机（三）人们是否应该接受人造肉Lab-Grown Meat Is Coming to Your Supermarket. Ranchers Are Fighting Back.Would you eat a hamburger or a chicken nugget你会吃在实验室生长的肉made of meat grown in a laboratory?所制的汉堡或鸡块吗？Joshua Tetrick, co-founder and CEO of JUST is betting that you will. JUST的合伙人兼CEO Joshua Tetrick断言你会吃In tomorrow’s world, you can eat more meat,在将来你能在不吃动物的情况下hopefully safer meat, even better tasting meat, without eating the animal.吃到更多的肉很可能是更安全甚至更好吃的肉JUST which is based in San Francisco,JUST公司位于美国旧金山has been producing and selling2013年起就生产销售non animal versions of food like mayonnaise since 2013各种无动物食品and it’s raised more than 310 million dollars in venture capital.并筹集到超过3.1亿美元的风险投资基金Tetrick and his team have created products like JUST Mayo Tetrick及其团队通过寻找鸡蛋等常见动物产品的植物替代品by identifying plant based alternatives to common animal products like eggs.创造了像JUST Mayo这样的产品We’re one part pharma,我们公司有医药部one part bio-tech and a whole bunch of regular food company.有生物技术部总得来说是一个常规的食品公司We built a discovery system that我们创建的搜索系统has the only patent of the world拥有世界上唯一能够that utilizes machine learning for food ingredient discovery利用机器学习如何搜索食物组成的专利and it helped us find this mung bean该系统还帮我们找到了that when you put it in a pan scrambles一种放入平底锅时变得蓬松的绿豆and that process broken down means that这一过程的突破意味着we source from over 51 countries in the world,我们的原料来自超过世界上51个国家we look at about 21 different molecular properties,我们要研究大约21种不同分子的性能we look at how that bean functions,研究这种绿豆的作用does it bake a cake, does it gel in a pan看它能否用来烤蛋糕是否会粘在平底锅上and then we see if it makes ice cream or butter or scrambled eggs. 以及能否用来做冰淇淋黄油或炒鸡蛋Our process of finding these new tools is high tech,这些新工具的开发过程技术含量高but what we find is not high tech at all.但开发结果却简单的很The mung bean has been in the world’s food system for 4400 years.早在4400年前绿豆就已经被当做食物了I sure as hell didn’t invent the mung bean.我很肯定绿豆不是我发明的JUST is one of the handful of tech companies workingJUST只是众多致力于to disrupt the meat production industry.颠覆肉类供应行业的高科技公司之一While many of its competitors are pursuing better plant based meat substitutes,正当其他竞争者还在寻找更好的以植物为基础的肉类替代品时JUST is pushing ahead with so called clean meatJUST已经开始推进所谓的瘦肉or lab grown animal tissue that requires no farming,和无需农场养殖无需喂养牲畜且无需屠宰场no feeding of livestock and no slaughterhouses.的实验室生长的动物组织Only a single sample from a single animal duplicated endlessly.只需要动物身上的一个样本就可以无限克隆JUST and companies like it are poised toJUST和其他同类公司准备disrupt the entire livestock industry but颠覆整个畜牧业the established players are turning to the government to protect their turf.但是现有的畜牧公司正在向政府寻求庇护The United States Cattlemen’s Association, which declined to participate in this story,美国牧民协会拒绝受访submitted a petition still under consideration by the United States Department of并向美国农业部递交了请愿书目前正在受理中Agriculture asking that the words meat and beef exclude any products他们请求肉和牛肉这样的词汇不得用于that are ‘neither derived from animals, nor slaughtered in the traditional manner.’任何既不来自动物也不经传统方法宰杀的肉类产品The power of the terms is a lot more powerful than people think, 这些术语的影响力远比人们想象的要大especially in food尤其是在食品行业Imagine Tesla launches a pickup truck,想象一下如果特斯拉推出了一辆小货车but US Department of Transportation says然后美国交通部门说-Hold up, Tesla, y ou can’t call it a pickup truck.-等等特斯拉你不能把它称作小货车You have to call it electric mobility transport unit.你必须叫它“电动交通装置”That’s not winning in Alabama, even though it might be fast,这在阿拉巴马州行不通即使它可能很快even though it might have an amazing amount of horsepower,马力也超级大because a car is identity, but food’s identity even more.因为车有它的定义而食物的定义则更复杂JUST is also looking to transcend the vegan vs carnivore paradigm. JUST也在试图寻找一种超越纯素食主义者和肉食主义者的范式来界定We don’t allow the term vegan to be used in our company.我们公司不允许使用“纯素食主义者”这个词Not because we don’t believe in the spiri of it,并不是因为我们不相信素食主义精神that word ends up turning off 99% of people.而是这个词会令99%的人反感The food system needs to start over,食物体系需要革新了little girls in the second row of a class in Liberia aren’t ge tting proper nutrients,在利比里亚教室里第二排的女孩们营养不良a young boy growing up in Birmingham Alabama is阿拉巴马州伯明翰的一个男孩accelerating a path to Type 2 diabetes,患2型糖尿病的速度加快了animals are being confined in needless ways,动物们受到了一些不必要的限制it’s contributing to climate change,这加剧了气候变化and I think if we can think differently about the food system而且我觉得如果我们对食物系统换种思维while also realizing that we can’t be so new and so out there同时认识到我们不能太新奇太超前that it doesn’t relate to the everyday human being,以至和百姓的寻常生活脱节we can do a whole lot of good.我们就可以造福大家And that’s what I want to do.而这就是我想要做的This isn’t Tetrick’s first fight with entrenched food interests.。
