2019年大学生英语演讲稿- My Opinion On Cloning-精选word文档 (2页)

大学生英语演讲稿20xxin my 18 years of life, there have been many things. university days are the best part of them. i can never forget the days when i stepped into my university. i was impressed by its garden-like campus, its enthusiastic students and especially its learning atmosphere. i at once fell in love with it.after the arduous military training, i get absolutely absorbed in my studies. the classes given by the teachers are excellent. they provide us with information not only from our textbooks but from many other sources as well. they easily arouse my insatiable desire to take in as much as i can.frankly speaking, at first i had some difficulty following the teachers. however, through my own efforts and thanks to my teachers' guidance, i made remarkable progress. now i've benefited a lot from lectures and many other academic reports.learning is a long process; i'll keep exploring in the treasure house of knowledge to enrich myself. this summer i got out of the ivory tower and entered the real world. a publishing house offered me a part-time job in compilation and revision.at the beginning i was belittled by my colleagues. but theywere really surprised when i translated seven english articles over 5,000 words on only one day. gradually, they began to look at me with respectful eyes. in their opinion i turned out to be a useful and trustworthy colleague.i also realize that only those who bring happiness for others can be truly happy. so i often take part in activities concerning public welfare. i once went to a barren mountain village with my classmates. we taught the kids there who could not afford school. while showing them how broad and how civilized the outer world is, i was deeply touched by their eagerness to learn, their honesty and their purity. i couldn't control my tears on the day when we left. the precious experience with the poor kids made me aware of the responsibility on the shoulders of us, future teachers.besides study and social practice, there are entertainments as well. i do body building every day, hoping to keep healthy and energetic. we also write a play and put it on in our spare time.campus life is the most splendid time. but different people have different choices. the majority of students cherish their beautiful season and cherish the hope that one day they'll become outstanding. but there are indeed some students still underignorance. they gather together for eating, drinking or playing cards. they're busy in searching for a girlfriend or a boyfriend. they forget completely about their mission as college students and the hope of their motherland.finally, i do hope everybody can try their best to become a worthy citizen of the country. i do hope everybody can become the backbone of our nation and make great contributions to society!译文:享受生活、不忘使命在我这18年的生命中，有着许多美好的经历，而大学生活则是其中最难忘的一段。

2019大学生英语演讲稿-英语演讲稿i believe in our futurehonorable judges, fellow students:good afternoon!recently, ther is a heated debate in our society. the college students are the beneficiaries of a rare privilege, who receive exceptional education at extraordinary places. but will we be able to face the challenge and support ourselves against all odds? will we be able to better the lives of others? will we be able to accept the responsibility of building the future of our country?the cynics say the college students are the pampered lost generation, which would cringe at the slightest discomfort. but the cynics are wrong. the college students i see are eagerly learning about how to live independently. we help each other clean the dormitory, go shopping and bargain together, and take part time jobs to supplement our pocket money.the cynics say we care for nothing other than grades; and we neglect the need for character cultivation. but again, the cynics are wrong. we care deeply for each other, we cherish freedom, we treasure justice, and we seek truth. last week,thousands of my fellow students had their blood type tested in order to make a contribution for the children who suffer from blood cancer.as college students, we are adolescents at the critical turning point in our lives. we all face a fundamental choice: cynicism or faith, each will profoundly impact our future, or even the future of our country. i believe in all my fellow classmates. though we are still inexperienced and even a little bit childish. i believe that we have the courage and faith to meet any challenge and take on our responsibilities. we are preparing to assume new responsibilities and tasks, and to use the education we have received to make our world a better place.i believe in our future.我对未来充满信心尊敬的评委，各位同学：下午好!最近，社会上有一场很激烈的争论。

My views on human CloningCloning(克隆技术)is the most attractive story of the new biotechnologies(生物技术) and the one which causes the most heated discussion over its worth. Here are answers to the most common questions about cloning.If therapeutic cloning using embryos is successful, then perfectly matched, replacement organs could become freely available to sick and dying people. That would save countless numbers of lives, and increase the quality of life of countless others. Three possible examples of therapeutic cloning "might include the use of insulin-secreting cells for diabetes; nerve cells in stroke or Parkinson抯disease; or liver cells to repair a damaged organ." 4 There would probably also be side benefits resulting from the research. "Further advances in understanding of how organs regenerate would increase the range of possible treatments that could be considered." This procedure would have a number of advantages, when compared to regular organ transplant donated by a second person:There would be presumably be no danger of rejection of the transplant because the organ's DNA would match the patient's DNA exactly.For transplants involving kidney (or theoretically any other organ that is duplicated in the body), another individual would not have to experience pain, inconvenience, and potentially shortened life span in order to donate the organ.The patient would not have to wait until an unrelated donor dies to obtain a transplant. A new organ could be grown for them as needed.The patient would not have to make-do with a replacement organ that is old and may have reduced functionality; a brand-new organ would be grown specifically for them. The procedure would save lives which would otherwise be lost waiting for a transplant that did not come in time.The potential exists to cure, or at least treat, certain diseases and disorders that cannot be effectively handled today.What are the problems of therapeutic cloning:Before therapeutic cloning can become generally available to cure heart disease, diabetes, paralysis, etc., a number of hurdles have to be overcome:Developing cures: Methods have to be developed that will cure or treat diseases with embryonic stem cells. This looks promising. Research with adult stem cells, which has been underway for many years, have shown great promise. Unfortunately, adult cells are limited in their application. Research using therapeutic cloning is a new field, but it has already shown that stem cells from embryos have much greater flexibility than adult stem cells.Is an embryo a human person? Pro-life supporters generally believe that a human person comes into existence at conception. Some believe that somatic cell nuclear transfer is sufficiently similar to normal conception with an egg and spermatozoa that a human person also comes into existence during therapeutic cloning. The process of extracting stem cells involves killing the embryo. To many pro-lifers, this is murder. They feel that murdering one person, the embryo, to cure another person of paralysis, or diabetes, or heart disease, etc. can never be justified. More details. Therapeutic cloning research may well be limited to those countries, like China, the UK, and perhaps Canada, where pro-life supporters are relatively few in number.Stability of stem cells: As of 2003-MAR, therapeutic cloning is still in its early stages of development. Stem cells have sometimes mutated, and thus been rejected by the recipient's body. In other cases, at least with experiments on animals, they have produced tumors. It is obvious that therapeutic cloning will not be feasible until these deficiencies have been overcome.Where would the eggs come from? At the present stage of somatic cell nuclear transfer, Thomas Okarma, chief executive of Geron Corporation -- a leading stem-cell research establishment -- estimated that takes "100 eggs if you're lucky" to produce a useable stem cell line. 6 This means that if a cure for diabetes involving therapeutic cloning is found, it would take 1.5 billion eggs to cure the 15 million Americans who have diabetes. Until the production of stem cells becomes more efficient, very few cures could be made for economic reasons. Even if and when techniques are found to reliably produce one custom stem cell line for each egg harvested from a woman, 15 million eggs would be required to completely wipe out diabetes. Extracting eggs from women is "painful, costly and unreliable." 7 Focus on the Family, a Fundamentalist Christian group, cited an unknown expert who has said that the process of harvesting eggs would seriously injure about one percent of all female donors. 8 We have been unable to determine what form this injury might take. Assuming two dozen eggs per woman, this would still require over a half million women willing to donate eggs and run the risk of some type of injury. Therapeutic cloning will probably only become generally useful when a method is found to use non-human eggs as source material. Research is underway to use rabbit eggs. During the process, "the embryo will lose all traces of its rabbit origin." 7Cloning hit the mainstream as a scientific debate when scientists cloned a lamb named Dolly in 1996. Cloning is a process that results in an identical genetic copy of abiological product such as cells, tissues, genes or entire entities. After scientists took cloning beyond the genetic engineering of simple DNA to actual mammals, the controversy grew to new heights.Understanding Artificial CloningScientists use artificial cloning for use with genes, reproduction and therapy. "Gene cloning produces copies of genes or segments of DNA," according to the National Human Genome Research Institute. "Reproductive cloning produces copies of whole animals. Therapeutic cloning produces embryonic stem cells for experiments aimed at creating tissues to replace injured or diseased tissues."Cons of CloningThere have been multiple failed attempts at cloning. The National Human Genome Research Institute states that "Dolly was the only clone to be born live out of a total of 277 cloned embryos." The health effects that cloning has had on animals is a cause for concern. Clones are also subject to a shorter lifespan due to the age of the cells used in the cloning process.Ethical Issues of CloningThe cloning of animals and failed attempts at human cloning have been a cause for many ethics-related issues. Human cloning has a direct impact that challenges or runs counter to the moral or religious values of millions of people. There is also the argument that human cloning threatens freedom of individuality. Pro-life advocates oppose the research and destruction of test tube embryos。

2019-大学英语演讲稿范文：我的理想-范文word版本文部分内容来自网络，本司不为其真实性负责，如有异议或侵权请及时联系，本司将予以删除！== 本文为word格式，下载后可随意编辑修改！ ==大学英语演讲稿范文：我的理想everyone has his own dream, which can be realized or not and which can be different from time to time. however, there must be a long –term one in one’s mind. in other words, it is not easy to be realized. i have a dream: to pass cet-6 before i graduate from the university. it’s maybe easy for most of my classmates, but to me it is as difficult as cracking the hardest nut in the world.i have been studying english for about 10 years. it should not be the no.1 task in my university agenda, but too many failures forced me to do so. i entered one of the most famous universities in china with the almost lowest english mark among all my students. i was really disappointed about that. although i was not good at english when i was in the middle school, it was not at least about the average. i had no strength to face the frustration. after a semester’s study i was the lowest indeed. i have never cried for study before, but this time i shed tears. since then i made up my mind to pass cet-6 before my graduation.glanced back to my english studying experience, i realized that interest is one of the key factors to grasp knowledge. i study english only for the examination before, but not the language itself. that is the weakest point of me. i must overcome it so as to realize my dream. i made a plan: read one story until i can recite it each day; listen to the tapes related to the books as well. english is not so disgusting for me now. i will persist in doing so even after i pass cet-6. i wish my english would be as good as my native language in the future.。