2019-2020-雅思写作题目总结:科技类-推荐word版 (1页)
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题目1:电子图书馆能否代替传统图书馆Maintaining public libraries is a waste of money since computer technology can replace their functions. To what extent do you agree or disagree?思路:1. 基于网络,可以随时随地的连接和使用,这带来了极大的便利。
举例,人们在家中就可以上线阅读,这节约了那些原本要花在交通上的时间和精力,同时,这也消除了那些行动不便的人,如老人和残疾人对于出行的担心。
最终,电子图书馆提供了阅读上舒适和方便,通过摆脱物理上的限制(physical limits)。
2. 电子图书馆是一个虚拟的系统,节约成本。
举例,它的组成只需要一个小小的机房和几台服务器,这大大的节约了土地和建筑成本。
此外,电子图书馆能实现电脑对于图书的自动管理,这也节省了那些人力的维护成本。
3. 极大提升信息检索的效率。
电子图书馆是一套先进的信息管理系统,人们只需要输入关键字和点击鼠标,它在数秒之内就能够完整地,准确地分析,查找,归类和排序相关的信息资源,这大大节约了人们在数据查询上的时间。
相反,在传统图书馆,人们不得不花费大量时间和精力在书架之间游荡,或是搬运图书。
4. 环保。
电子图书馆实现了信息的无纸化存储。
这大大减少了对于纸张和工业印刷的需求,最终,它保护了森林,也减少了污染。
范文(Band 9):IT industry has made too many revolutionary changes in all aspects of the society, and the public education is not exempt from this trend. Personally, I strongly believe that the Internet-based library, or electronic library, will take the place of the real-world library in this century, and my reasons will be explored as below.This assertion is fundamentally right, because of the incomparable advantages of advanced computer technology. Firstly, the e-library can bring great convenience to the audience. Obviously, online technology eradicates the physical and time limits, and makes the e-library universally at all times and places. For example, people can have an easy and comfortable access to the e-library by using the Internet at home, which saves the time and energy that could be wasted in going out to the real library, or standing in the long queue in front of the loan desk.The second reason of supporting e-library is about the costs. Compared with areal library whose operation relies on big multi-storey buildings, complicated security systems and hundreds of administrators, the running of an e-library is much cheaper and simpler, because all it needs are no more than a small room with few servers. That is to say, the wide application of e-library can substantially save the land, budget of education and social jobs.The third, and perhaps the most important reason why the substitution of e-library for the physical one is desirable is its efficiency. E-library is an advanced information management system. What readers have to do is to enter key words and click the mouse, and this system can automatically realize the location, analysis, filtering and presentation of all relative information and data from millions of collected books, in just few seconds.All in all, my opinion is advantages brought by new computer and Internet technology, from the convenience to cheapness to high efficiency of information searching, provides good reasons for modern people to embrace the e-library and abandon tangible ones.(327)题目2:互联网是否削弱了人们的社交能力People can go to shop, bank, and work with computer. But the danger is that people are getting isolated and losing some social skills. To what extent do you agree with this opinion?思路:1. 互联网的滥用当然会弱化人们之间的社交。
雅思写作科技类话题素材1科技类话题是雅思写作中常见的一个主题,因此准备一些相关素材是很有必要的。
下面我将为你提供一些关于科技类话题的素材,供你参考:1. 人工智能(Artificial Intelligence,简称AI),AI是近年来发展迅速的一项技术,它在医疗、交通、教育等领域都有广泛的应用。
例如,AI可以帮助医生进行疾病诊断,提高准确性和效率;AI可以改善交通系统,减少交通拥堵和事故发生率;AI还可以个性化教育,根据学生的特点和需求进行教学。
2. 无人驾驶汽车,无人驾驶技术是未来交通领域的一个重要发展方向。
无人驾驶汽车可以提高交通安全性,减少交通事故;它还可以提高交通效率,减少拥堵;同时,无人驾驶汽车也能为老年人、残疾人等特殊群体提供便利。
3. 互联网,互联网的普及和发展改变了人们的生活方式。
人们可以通过互联网购物、学习、工作等。
互联网还促进了信息的传播和交流,加强了国际间的联系和合作。
4. 社交媒体,社交媒体如Facebook、Twitter等已经成为人们日常生活中不可或缺的一部分。
社交媒体可以帮助人们与朋友、家人保持联系,分享生活点滴;同时,它也成为新闻传播的重要渠道,人们可以及时了解到全球各地的新闻动态。
5. 3D打印技术,3D打印技术可以将数字模型转化为实体物体,为制造业带来了革命性的变化。
它可以加快产品开发和生产的速度,降低成本,实现个性化定制。
6. 虚拟现实(Virtual Reality,简称VR),虚拟现实技术可以创造出一种仿真的虚拟环境,使用户身临其境。
VR技术在游戏、旅游、教育等领域有广泛应用,为用户带来全新的体验和享受。
以上是一些关于科技类话题的素材,你可以根据具体的题目和要求来灵活运用这些素材,展开论述。
记得在写作过程中要注意逻辑性和连贯性,合理组织素材,以达到全面、完整的回答。
祝你取得好成绩!。
ordinary people more than recent technological developments. To what extent do you agree or disagree?以前的科技发展比现在的科技发展更使普通人民受益吗2 There are social, medical and technical problems associated with the use of mobile phones. What forms do they take? Do you agree that the problems outweigh the benefitsof mobile phones?手机会有社会健康和技术问题吗、。
都是什么问题。
问题大于益处吗3 Leisure is a growing industry, but people no longer entertain themselves as much as they used to because the use of modem technology has made them less creative. Do you agree or disagree with this statement?随着科技的发展,人变得没有创造力,不像以前那样会娱乐自己了吗4 Television has had a significant influence on the culture of many societies. To what extent do you think television has positively or negatively affected cultural development?电视对社会文化的影响积极还是消极5 Some people think that modern technology is increasing the gap between the rich and the poor. To what extend do you agree with their opinion?科技加大贫富差距吗6 When a country develops its technology, the traditional skills and ways of life die out. It is pointless to try to keep them alive. To what extent do you agree or disagree with this opinion?传统技术和生活方式会因为国家的科技发展而灭亡。
雅思写作高频词汇分类汇总一.科技类1。
advanced science 尖端科学2。
scientific invention 科学发明3。
exert a far—reaching impact on…对…产生一种深远的影响4。
double—edged sword 双刃剑5。
earth-shaking changes 翻天覆地的改变6.pay the way for the future development 为未来的发展铺平道路7。
lay a solid foundation for…为…打下良好的基础8。
energy crisis 能源危机9.depletion of resources 能源消耗10。
milestone 里程碑11.sophisticated equipment 尖端设备12。
technical innovation 科技创新13。
expediency 权宜之计14.antithetical 与…背道而驰的15。
over-commercialized 过渡商业化的16.a heated discussion 热烈的讨论17。
exhaust gas 废气18。
disastrous 灾难性的19.overshadow 使…相形见绌20。
compared to/with…与…相比21。
usher in 引领22。
speedy and comfortable 既快捷又舒适23。
opposite forces 负面影响24。
a fatal breakdown 致命故障25.potential hazards 潜在危险26.pose a threat to…对…有一种威胁27.promote relative industries 促进相关产业发展28。
accelerate 加速…29.means of transportation 交通方式30.transportation tools 交通工具31。
雅思写作大作文科技类话题素材集合1. 科技对生活的影响- 科技的迅速发展已经深刻地改变了我们的生活方式和社会结构。
- 人们现在更加依赖科技,例如智能手机、社交媒体和互联网。
- 科技的发展提高了生产效率和便利性,加速了信息传播和全球交流。
- 然而,科技的高速发展也带来了一些问题,例如信息安全、隐私保护和数字鸿沟等。
2. 科技在教育领域的应用- 科技在教育领域扮演着重要的角色,如在线研究平台、虚拟实境教学等。
- 学生可以通过科技获得更多的研究资源,提高研究的灵活性和便利性。
- 教师通过科技工具可以更好地展示课程内容和与学生互动。
- 虚拟实境技术可以使学生获得更实际的研究经验,增加研究的兴趣和动力。
3. 科技创新对经济发展的影响- 科技创新对经济发展起着重要作用,可以推动产业升级和增加就业机会。
- 先进的科技创新可以提高生产效率,降低生产成本,提高产品质量。
- 电子商务和互联网平台的兴起,为企业提供了更大的市场机会和全球化发展的可能性。
- 技术创新可以激发创业精神和推动整个经济生态系统的发展。
4. 科技在医疗领域的应用- 科技在医疗领域的应用极大地改善了医疗服务和病人生活质量。
- 医疗设备和技术的进步使诊断更准确,治疗更有效。
- 远程医疗技术使得病人可以在家中获得医疗服务,方便了偏远地区的病人。
- 科技帮助研发新药和治疗方法,为治愈一些罕见病和慢性病提供了希望。
5. 科技对环境的影响- 科技的发展对环境产生了双重影响,既有正面的,也有负面的影响。
- 科技可以提高能源利用效率,降低排放量,推动可持续发展。
- 然而,科技的发展也带来了环境问题,如电子废物、能源消耗和空气污染等。
- 在科技发展的同时,我们需要注重环境保护和可持续发展的平衡。
以上是一些关于科技类话题的素材,供您参考和使用。
您可以根据具体题目和要求,结合这些素材进行论述和支持观点。
2019雅思作文范文
2019年雅思写作范文,科技与社会。
题目,科技对社会的影响。
现代科技的发展给社会带来了巨大的影响。
有人认为科技的发展对社会有益,而另一些人则认为科技的发展对社会造成了负面影响。
本文将探讨科技对社会的影响,并给出自己的观点。
首先,科技的发展给社会带来了巨大的便利。
随着互联网的普及,人们可以通过网络购物、在线学习、远程办公等方式方便快捷地进行各种活动。
此外,现代科技的发展也为医疗、交通、通讯等领域带来了巨大的改变,使得人们的生活更加便利和舒适。
其次,科技的发展也为社会带来了一些问题。
首先,科技的发展使得人们的生活节奏加快,工作压力增大,导致了许多人的身心健康受到影响。
其次,科技的发展也给环境带来了很大的压力,例如汽车尾气、工业排放等都对环境造成了不小的污染。
另外,科技的发展也引发了一些社会问题,例如网络安全、信息泄露等问题。
然而,尽管科技的发展给社会带来了一些问题,但我认为科技的发展对社会的影响是积极的。
首先,科技的发展为社会带来了巨大的便利,使得人们的生活更加丰富多彩。
其次,科技的发展也为社会带来了更多的就业机会,促进了社会的发展和进步。
另外,科技的发展也为社会带来了更多的创新,推动了社会的发展。
因此,我认为科技的发展对社会的影响是积极的。
尽管科技的发展可能会带来一些问题,但只要我们正确地应对这些问题,科技的发展对社会的影响将会是积极的。
希望未来科技的发展能够更好地造福社会,让人们的生活更加美好。
2019年雅思写作开头范文:technology and interact-word范文本文部分内容来自网络整理,本司不为其真实性负责,如有异议或侵权请及时联系,本司将立即删除!== 本文为word格式,下载后可方便编辑和修改! == 雅思写作开头范文:technology and interact下面雅思为大家提供了三个雅思写作的开头范文,都是关于科技和交流方式的。
雅思写作开头对于雅思写作整篇文章而言是非常重要的,因为要起到点题,开门见山等作用,还要引起下文。
下面我们来看看雅思写作开头的详细内容吧。
The development of technology changes the way people interactwith each other . In what ways does technology affect the types of relationships people make ? Is it a positive or negative development ?开头段一As a matter of fact , the issue on the effects of science and technology is a complex and controversial one . Different individuals can hold various opinions due to their distinct backgrounds ,therefore , there is no universal answer to this question . In some areas , some people believe that technology has brought benefits on peoples relationship , in other fields , others mountain that it has some side effects .开头段二It is undeniable that science and technology has played an increasingly important role in modern society . The benefits broughtby such trend are obvious , but problems have also been welled up .As for its influences on peoples relationship , I believe the advantages brought by technology outweigh its drawbacks .开头段三Even two decades ago , few people could have imagined that wecan perform our daily tasks via computer . Now more and more peopleare choosing to do the shopping , banking and even work online . So how can such trend affect the interactions between modern - daypeople ? I will give my answer in the following essay .。
雅思写作大作文科技类话题素材整理
1. 人工智能(Artificial Intelligence, AI)
- AI在医疗领域的应用:比如辅助诊断、手术机器人等,能够提高效率和精准度,但也引发隐私和道德问题。
- AI对就业的影响:部分工作岗位可能被机器人取代,但同时也会创造新的就业机会。
- AI在教育领域的发展:个性化教育、智能教辅等,对研究方式和教学模式产生积极影响。
2. 科技对环境的影响
- 电子垃圾处理:随着科技的迅猛发展,电子垃圾成为了一个问题,需要加强回收和处理。
- 可再生能源的推广:科技的进步可以推动可再生能源的发展和利用,减少对化石燃料的依赖,从而降低环境污染和碳排放。
- 环境监测技术的进步:科技的应用可以提高环境监测的精确度和效率,帮助解决污染问题。
3. 网络与社交媒体
- 网络对交流的影响:人们通过网络可以方便地进行信息传递和沟通,但也引发了信息泛滥和虚假信息的传播。
- 社交媒体对个人隐私的影响:社交媒体的普及使得个人隐私面临更大的风险,需要加强隐私保护措施。
- 网络对教育的影响:网络技术的应用改变了传统教学模式,提供了更多在线研究机会和资源。
4. 科技与经济发展
- 科技创新对经济的推动:科技创新可以带来新的产业和就业机会,促进经济增长。
- 数字经济的兴起:科技的进步推动了数字经济的发展,改变了传统产业和商业模式。
- 科技对就业结构的影响:科技进步可能导致部分工作岗位的消失,需要加强职业转型和培训。
以上是一些关于科技类话题的素材整理,供大作文参考使用。
科技类1.Some people think that robots are very important for humans’ future development. Others, however, think that robots are a dangerous invention that could have negative effects on society. Discuss both views and give your opinion.The field of science and technology has advanced throughout the past decades and has changed our perspectives of life. Among those advancements, robots have become significant by trying to get close to human lives. While some people argue that though these robots have managed to solve most of our day-to-day problems, they can still create problems, I believe that robots are significant for humans’ current and future development.It is normal for people to be worried about the rise of robotics in every aspects of our lives. In workplace, one of the real impacts humans face is the loss of jobs and the economic displacement of workers. As prices continue to drop for advanced technology, the result is that robots cost less than a human does to complete the same job. Consequently, wages are slashing and pay inequality is worsening. Moreover, when societies become too dependent on robots, humans become lazy and begin to lose the skills that they has replaced. Last but not the least, it’s not a stretch to imagine that untrustworthy robo ts may cause over-trust issue and deception. As anthropomorphic robots come to the physical world, people, children particularly, are susceptible to telling their deepest, darkest secrets to these robots whose cute faces may hide exploitative code.Nevertheless, the benefits that robots bring about could outweigh these potential risks. Many robotic solutions have been introduced in order to help disabled people. For example, wheelchairs, robotic arms, and many other robotic devices are created to help the disabled to perform their day-to-day tasks. Moreover, some of the greatest technologies are now in medicine, particularly with robot surgeons. In addition, robots are used in many high end factories to make their production lines more efficient and time saving. Compared with humans, robots rarely make mistakes and are more precise. As long as they have power, they can work continuously without any pauses or breaks and does not get tired as humans.In conclusion, there are good aspects as well as bad aspects about robots being a part of our lives. As long as humans remember that it is we who should decide on how much we let them control our lives, we could enjoy the life with robots around.2.Today, advanced science and technology have made great changes to people’s life, but artists such as musicians, painters and writers are stillhighly valued. What can arts tell us about life that science and technology cannot?Almost every aspect of modern human life has been influenced by science and technology. One area where technology is already having a profound impact is the world of art. Art is one affected and redefined by technology in a new way. Yet, some people argue that even with advance technologies that enable faster creation of works, artists are still high valued. I totally agree with this idea since efficient creation does not necessarily mean highly appreciable works.Admittedly, technology is shedding light on the ability to duplicate and create arts. For example, pianist robots are created to sit in front of a piano center stage and move their fingers with great accuracy and speed to play a piece from Mozart. Additionally, sketching portraits of humans, spontaneously composing music, and writing traditional Chinese calligraphy are already possible in the world of robots. Further, digitizing artwork help to make it more accessible to a wider audience. Livestreaming opera performance, for instance, enables people to enjoy the show online at home instead of taking a trip. Lastly, advanced technology have also allowed contemporary artists to reduce time spent in the actual execution of artwork to a minimum thereby freeing them to focus more on contemplation, creativity and developing groundbreaking ideas, as well as sound preparation for artwork. Nevertheless, technology unavoidably surface a lot of works with less artistic value and will never outshine artists’ creativity and imagination. The interpretation and creation of music is basically the expression of feelings. For example, when an artist sees beautiful scenery, he may immediately make a sketch, paint then, or just write a poem about what he saw. In contrast, machines that humans are used to operating as tools have little emotive understanding of the social, historical, psychological and physiological factors that inspire human artists, which makes it difficult to accept them as having the ability to be creative.In conclusion, contemporary art has been greatly influenced by the rapid development in digital technology. Given that these influences are inevitable, artists need to hone their skills and understand these techniques well in order to translate their vision and creativity into great and distinctive art pieces. 3.Nowadays, high-technologies such as mobile phones and internet are rarely used by old people. How should these technologies be useful to old people? How to encourage old people to use the technologies.Seniors consistently have lower rates of technology adoption than the general public. Given that high-technologies and internet could certainly benefit the elderly, it is necessary to come up with solutions to encourage them to take advantage of technologies.Both technologies and internet are useful to old people in all aspects of their life. Firstly, the elderly could maintain constant contacts with their relatives, friends, and children via video chat services like Skype, or other Internet-based communication channels such as email and social media. Secondly, smart technologies can assist older people to live safely and live well at home. With certain devices like a watch, senior people could easily call for help in case of emergency with the simple push of a button. Further, there are video games designed to help seniors exercise physically and mentally. For example, owning a Wii or other video game system offer a fun opportunity for old people to engage in light physical activity from the comfort of their own living room. Lastly, smartphone apps and cloud-based health information tracking systems can help seniors and their family caregivers keep information such as medical history, physician contacts, medication schedules, and health conditions organized and handy.However, older adults do face some unique barriers and challenges when it comes to adopting new technologies and Internet. In order to make seniors become perfectly capable of using new devices and visiting digital world, it would be helpful to develop devices tailored to the aging population and provide them with the right training. Currently, the reality is that a lot of applications and devices are designed mainly for the young, which makes it hard for old people to utilize. Therefore, high-tech companies and organizations should take the unique features of seniors into account in the R&D process. Communities and governments should organize some public classes specifically for the aging citizens to train them how to surf online, use smartphones, and other useful devices and applications. The aging populating themselves should be open to new technologies and actively engage in the learning process.In conclusion, technologies generally lead to a healthier lifestyle by helping senior citizens stay in touch with people, maintain their health, manage diseases and conditions, and tract treatments. Old people themselves, communities, and governments should work together to increase the rates of technology adoption by seniors.4.Some people believe that computers and internet carry more weight than traditional education in children’s study. Some others believe that traditional schooling and teachers are still essential and more effective. Discuss both viewpoints and give your own opinion.It is undeniable that computers and internet has played an increasingly significant role in education. More and more schools and institutions start to adopt such advanced technologies to educate children, but I believe that traditional schooling and teachers should still play the dominant role. Indeed, children can get a variety of benefits from using advanced computers and the Internet. Firstly, there are a wide range of information and knowledge that covers all areas, such as mathematics, literature, and geography, available online. In other words, children can now access information on every conceivable subject. Secondly, the Internet together with computers make education an equal opportunity for every child, especially for those who in impoverished and remote areas without any access to schools and teachers. Thirdly, computers allow students to have e-mail or other forms of internet-based conversations with experts on any subject around the world. No longer will students be limited by their own classroom or teachers. Lastly, the Internet has created a creative and interesting learning environment where children can explore, convey, create knowledge as never before.However, compared to computers and the Internet, traditional schooling and teachers are still important and more effective. To begin with, teachers know well about their students and normally impart them the most relevant and valuable knowledge. On the contrary, finding and retrieving information from a web site can be sometimes tedious and time-consuming. Moreover, children are too young to develop self-control and self-discipline ability. Therefore, the supervision and guidance from teachers become fundamental and necessary. Further, schooling provides children with a collective and interactive environment where they can learn not only from their teachers but also from their peers and classmates. Only in this way can they develop team work and cooperation skills which are essential and indispensable for their future life and career.In conclusion, despite the convenience and popularization of the Internet and computers, teachers and schools are still play an significant and irreplaceable role in children’s education. Yet, educational experts and institutions could take advantage of these advance technologies to offer better education to students.5.Universities and colleges are now offering qualifications through distance learning from the Internet rather than teachers in the classroom. Do you think the advantages of this development outweigh the disadvantages?Distance learning has become increasingly popular, and Universities and institutions are offering an enormous range of Undergraduate, Postgraduate,as well as short-term courses. Some people argue that this development could worsen the quality of teaching and learning, while I think there are many obvious advantages in using distant education.Online colleges have been criticized for a variety of reasons. Firstly, some say that the quality of online education cannot be comparable to face-to-face learning since the main driver for opening up online courses is to spend less on teachers and buildings. Secondly, there is no direct contact with faculty. Lack of personal interaction with teachers could affect the learning curve for some students. Thirdly, students, especially those lack of self-control and self-discipline, are likely to fail in courses since without teachers they will not take distance learning seriously. The last argument is that qualifications offered by distant learning are not valued by employers. Some employers will always prefer a candidate who has pursued a regular program over holders of the distance learning program qualification.However, the advantages of distant education outweigh the above mentioned disadvantages. One of the biggest advantages of studying from home is the cost comparative to studying full time at school. Internet-based education usually involves more affordable tuition than traditional college or university. In addition, part time distance learning students can work while studying towards their qualification. Also, with web-based classes, students are capable of saving time far more since they do not need to travel to schools for all classes registered. This enables those who have a job or have important personal responsibilities, like looking after family members, to get their degrees. Moreover, some accelerated programs enable students to complete their education in a short period and they can engage and pursue a career faster as well by completing a degree earlier.In conclusion, although distance learning is not suited for everyone, it does allow individuals who cannot attend regular education programs to get educated and gain their qualification.。
【2019-2020】雅思基础作文题目汇总(3)-实用word文档本文部分内容来自网络整理,本司不为其真实性负责,如有异议或侵权请及时联系,本司将立即删除!== 本文为word格式,下载后可方便编辑和修改! ==雅思基础作文题目汇总(3)为了方便广大考生更好的复习,综合整理了雅思基础作文题目汇总,以供各位考生考试复习参考,希望对考生复习有所帮助。
11. A friend will visit Beijing . You will meet him at airport . But for some reason , you have to be late . Explain the reason . Since you havent meet each other , tell the friend where you will meet and how to recognize each other .12. More and more childrens writing math ability are affected by computers and calculators . We should limit the use of those tools . Disagree or agree .13. you have broke your leg and have to stayed in hospital . you received many cards and letters from your classmates . write a letter to tell them your detail of your position and thank them at the same time .14. some people say that it is impossible for women to be an effective women and to be a good mother in home at the same time . they also suggest that the government should give the salary to mothers who stay at home to take care of their children .15. Your friend write to you and tell you that he is hesitating to chose computer or history as his major in university . Write to him and tell him your opinion .。
2019-2020-雅思写作题目总结:科技类-推荐word版
本文部分内容来自网络整理,本司不为其真实性负责,如有异议或侵权请及时联系,本司将立即删除!
== 本文为word格式,下载后可方便编辑和修改! ==
雅思写作题目总结:科技类
科技类的雅思写作题目是最常见的话题之一,也是考生练习的相对比较多
的一类题目。
下面雅思为大家整理了关于科技类的雅思写作题目的总结,包括
了对这个题目的延伸性话题的介绍等等,大家一起来看看详细内容吧。
1. 现代通讯科技
母题1: People can perform everyday tasks , such as shopping and banking as well as business transactions , without meeting other people face - to - face . What are the effects of this on individuals and society as a whole ?
提示:这道题目是经典的科技类话题,因为这道无脸化交易的题目浓缩了
网络购物、电视购物、网络银行, ATM 自助银行、手机银行、电话会议、视频会议等多种话题,是大家必写的话题之一。
母题2: Many employees may work at home with the modern technology . Some people claim that it can benefit only the workers , not the employers . Do you agree or disagree ?
提示:远程上班 telecommute 也是一个重点话题,对于员工和雇主当然都有好处。
2. 现代媒体
母题1: Some people believe that time spent on television ,
video and computer games can be valuable for children . Others
believe this has negative effects on a child . Discuss both views and give your own opinion .
提示:这道话题涵盖了电视、视频和电脑游戏的好处与坏处,可以多练习。