关于网络的利与弊的英语作文(通用20篇)

Every afternoon during the summer vacation, hundreds of thousands of teenagers pour into Internet bars. They switch on a computer, and indulge themselves in a fantasy world playing games such as World of Warcraft and Counter Strike.

As everyone knows, playing Internet games can do much harm to teenagers if they spend too much time in the virtual world. Firstly, it is an enormous waste of time and teens will have little time for their study. Secondly, those who play video games day and night will be harmed physically for lack of adequate sleep. Thirdly, teenagers’ social ties will suffer as a result of the immersion in the virtual world.

In my opinion, the whole society should pay more attention to this problem, especially the parents and the game industry. Besides, the youth shouldn’t spend too much time, energy or money on the Internet because study is their priority. In conclusion, the youth should make good and proper use of the Internet.

The Internet is one of the most discoveries of the twentieth century . More and more people or using the Internet . They usually use internet to send E-mails and play games . In many ways it has changed or will change our way of life .

Firstly , it will change our way of communication . We will exchange information with others on Internet instead of letters or telephones , which is much cheaper and faster and contains much more information .

Secondly , we can get information very quickly . Actually we can get information from all over the world in just a few minutes . It saves a lot of time .

Thirdly , we can make many friends through the internet . We can get in touch with people faraway , even from foreign conrtres . They can tell us a lot about their own counties .

Fourthly , we can buy things through Internet without going out and enjoy ourselves with some films and songs at home .

Furthermore , we can have on-line course-course in which students follow the Internet . We can work at home and in our own time . This enables us to use our time more flexibly .

In a word , Internet will change our life in many ways and it will be very helpful it we use the Internet wisely .

导语：随着网络的快速发展，现在有很多网络语言开始在青少年中盛行，下面是yuwenmi小编为大家整理的英语作文，欢迎阅读与借鉴，谢谢!

目前，一些诸如GG、MM、 Xia Mi 等网络语言在青少年中极为盛行，并且出现在家庭作业报告，甚至全国入学考试的作文中。请你以 “Should Internet Slang Be Prohibited (禁止)?”为题，根据下表内容用英语写一篇短文，并谈谈你自己的看法。

注意：

1. 短文开头已经给出，不计入总词数; 2. 词数：100-120左右

Should Internet Slang Be Prohibited?

At present， Internet Slang， such as “GG， MM， Xia Mi”， has become popular among the teenagers.

There are different opinions on Internet Slang. Some students think Internet Slang is vivid， fashionable and full of humor and intelligence. Besides， it makes chatting on the Internet quicker.

However， some other students think Internet Slang lacks depth of thought and is too simple. Also， it is hard to understand and not accepted by most people. The words sometimes might make people confused， even resulting in misunderstanding.

Every coin has two sides. In my opinion， living in the Information Age， if we don’t know the Internet Slang， we seem to fall behind the times. It will be OK as long as these terms are used correctly in proper situations.

【参考译文】

应该禁止网络语言吗?

目前，网络俚语，如“GG，MM，夏咪”，在青少年中已经流行起来。

关于网络俚语有不同的看法。一些学生认为网络俚语生动，时尚，充满幽默和智慧。此外，它使上网聊天更快。

然而，另一些学生认为网络俚语缺乏思想深度，过于简单。此外，它是很难理解和不被大多数人接受。这些话有时会使人迷惑，甚至造成误解。

每件事情都有两面性。在我看来，生活在信息时代，如果我们不知道互联网俚语，我们似乎落后于时代。只要这些术语在适当的场合正确使用，就可以了。

With the widespread of computer, more and more people tend to use Internet to get information and learn knowledge, especially, many educational agent use online class to teacher their students. Many people think it is convenient for students to obtain knowledge by online education and can save students lots of time spending on traveling between home and school. Some people think students can’t focus on studying by online education. In my opinion, we can benefit a lot by online education.

[关于网络英语作文

Now many of my classmates like to surf the Internet in their free time.I think Internet can bring us both advantages and disadvantages.

For example，I can surf the internet to learn more information about the world. And I can make more friends on it. I can also talk with my teacher or my classmates some problem after class。

However, Internet can make some problems at the same time. If you spend too much time on it ,you will be come lazy and cant put your heart on study. It will be even worse if you feel you cant live without Internet.

So we must be careful when we use the Internet.

现在我的很多同学喜欢在闲暇时间上网。我认为互联网能给我们带来两个优点和缺点。

例如,我可以上网了解更多关于世界的信息。我可以认识更多的朋友。我也可以跟老师或同学下课后一些问题。

然而,互联网可以使一些问题在同一时间。如果你花太多时间在这上面,你会懒惰,不能把心用在学习上。这将是更糟糕的是,如果你觉得你的生活不能没有互联网。

所以我们必须小心当我们使用互联网。

沉迷网络游戏

题目：李华沉迷于电脑游戏中，影响了学习。作为他的好朋友，你打算怎么帮他呢?请用下面所给的提示词写一篇不少于80字的短文。字迹工整，语言流畅。

提示词：give up concentrate on be (become)interested in

Li Hua spent too much time playing computer games and he fell behind others. As a good friend of his, I must do something to help him.

Firstly, I think it’s very important for him to learn lessons well. He should spend most of his time on his study instead of computer games. Secondly, I must tell him that playing computer games too much is bad for his health, especially for his eyes. So he must give it up. I can play more sports with him after school. Maybe he will become more interested in sports than computer games. And then Ill ask him to concentrate more on his study. Of course, I will try my best to help him with all his subjects. I think I can do it in many fun ways and let him find much fun in studying. At the same time, Ill ask both his parents and our teachers to help him, too. If I try these, Im sure he will make great progress soon.

As a product of modem computer and the Internet, online games have won great popularity among people, youngsters in particular. However, some people believe that young people who lack self-discipline can easily get indulged in these games and their health and academic performances are severely affected. This phenomenon can be found on TV reports from time to time, and many teachers and parents have expressed their concerns over this.

However, some others argue that online games are not always harmful. They can train the ability of youngsters to respond to things quickly. Moreover, they can stimulate their imagination and their interest in computer science. More importantly, it does bring people much pleasure and satisfaction, and release their pressure greatly.

From my point of view, online games are a wonderful entertainment if you play them in a reasonable way. When they interfere too much with your life, youd better give them up at once. Yet if you have enough self-control over them, you can certainly obtain real pleasure and benefit a lot from them.

Computer games are good to our life in some fields~Such as it can help us relax ourselves and maybe wo can have fun in the games!Someone even says they find true themselves in the game,they can be the best in the games!I think computer games are the production in the information time and of course are popular with the youth!

But playing more may not be good to us!Someone will spend more time and money in them!Its a waste I think!Its bad for our eyes and some scientits said it can make people be fool~

In a word,playing computer games isnt wrong but wed better contorl ourselves not to lose yourslves!Appropriate game is a pleasure but indulge in it may hurt you

With the arrival of the knowledge economy age, Internet, as a new media, has come into our life. Nowadays, getting on line and surfing the Internet for information has become popular in China, especially among college students and teachers. Why is Internet getting so popular in such a short time?

The popularity of Internet results from its great convenience and easy accessibility to information. Thanks to the Internet, a world of information is just a click away. E-mail is another contributing factor to its popularity. It can transmit your letter quickly, safely and accurately. Besides, Internet has some other uses. Doctors may use it to diagnose and treat their patients by discussing or exchanging experiences with doctors in other parts of the world. Students may obtain new knowledge from a national long-distance educational system via Internet. Finally, businessman can conduct E-commerce or E-business on the net.

With so many uses and advantages, there is no doubt more and more people will be wired to the Internet-the information expressway. In short, with its high speed and efficiency, Internet will be more popular in China in the near future.

The following aspects could best illustrate the advantages of Internet. Netsurfers (网上冲浪者) in different countries can share interesting knowledge and the latest information. Besides, Internet has provided a major opportunity to buy and sell merchandise (商品). What is more, people may get medical help or even vote on Internet. Its advantages seem countless.

以下几个方面能够最好地说明了互联网的优势。不同国家的网上冲浪者可以分享有趣的知识和一些最新的信息。此外，互联网提供了买卖商品的机会。更甚者，在互联网上人们可能获得医疗帮助，甚至是进行投票。它优点数不胜数。

Behind all this glowing talk, however, are some problems. Internet makes people passive by stop.

但是，在这一切光辉的背后，存在一些问题。互联网使人们止步了。

导语：近年来，互联网正以惊人的速度普及。一些人认为，互联网给我们带来很多好处，但另一方面，也有许多人强烈主张，其弊端也不容忽视。下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

In recent years,the Internet has been gaining its popularity at an amazing rate.Some people suggest that the Internet brings us a lot of benefits.But on the other hand,there are also many people who strongly advocate that its drawbacks should not be ignored.It is quite understandable that people from different backgrounds put different interpretations on the same issue.

Those who favor that the Internet has many advantages give their reasons as follows.In the first place,the Internet brings us great convenience and efficiency.For example,we can send E-mails to our friends in other countries in a few minutes while sending a traditional letter takes us at least a week and cost much.In the second place,we can make friends with people from all parts of the world.It overcomes the geographical barriers and makes the world smaller.Furthermore,the Internet accelerates the flow of information and spreads education to all corners of the globe.We can have easy and quick access to the latest information worldwide.

However,the other side of the coin voices its strong opposition,saying that the Internet has many weaknesses.For one thing,it can easily lead to psychological problems.An internet-addicted person tends to be isolated,self-centered and unsociable.For another,there is a sharp rise in the number of cyber crimes.More and more financial crimes such as money laundering are committed via the Internet.In addition,it also has negative impacts on young people because there are a lot of obscene and violent contents on line.

There is probably a litter bit of truth in both arguments.For my part,I completely agree with the latter view that the Internet has more disadvantages than advantages.It gives rise to people’s mental problems.It results in various computer crimes.What is more,it is harmful to the growth of the young.Something should be done as soon as possible to protect people from the negative effects of the Internet.

【参考译文】

近年来，互联网正以惊人的速度普及。一些人认为，互联网给我们带来很多好处，但另一方面，也有许多人强烈主张，其弊端也不容忽视。它是来自不同的背景，提出不同的解释，对同一个问题人们完全可以理解。

那些认为因特网有很多好处给他们的理由如下：首先，互联网给我们带来了极大的方便和效率。例如，我们可以发送电子邮件给我们的朋友在其他国家在几分钟内同时发送一个传统信需要我们至少一周的费用多。第二的地方，我们可以和来自世界各地的人交朋友。它克服了地域的障碍，使世界变小了。此外，互联网加速了信息的流动和教育波及到世界各个角落。我们可以方便快捷的访问到全世界最新的信息。

然而，硬币的声音强烈反对对方，说互联网有很多缺点。首先，它导致了心理上的问题。一个沉迷于网络的人往往是孤立的，以自我为中心，不合群。另一方面，在网络犯罪数量急剧上升，越来越多的金融犯罪通过互联网。此外，它还具有对青少年的负面影响，因为在网上有很多淫秽和暴力的内容。

这两种观点可能都有点道理，就我而言，我完全同意，互联网弊大于利的观点。它增加了人们的心理问题，导致各种各样的电脑犯罪。更重要的是，它是对年轻人的成长是有害的。应该尽快做好保护人们不受网络的负面影响。

导语：任何事物都有两个方面，网络也是一样，对于网络我们要利用好它的优点，避免它的缺点，让网络真正为人们的生活服务。 下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

现在是一个网络的时代，它给人们带来了前所未有的方便，使人们交流更方便，知识共享更全面，但同时也给人们带来一些不好的地方，许多孩子沉迷于网络，不可自拔，下面就是一篇关于网络利与弊的中考英语作文。

Advantages and Disadvantages of the Internet

Internet is now coming into our life. It brings us not only a lot of convenience ，happiness but also troubles. Some students use Internet as a too to study. They look up the meanings of the words， a translated form of a sentence，the background of an event or a story ，the information of a company or a famous person，etc.

They also read news or send e-mails through it. Internet helps them learn more and study well.

On the other hand，some students play games，chat with friends ，see the pictures or films even the unhealthy ones on the Internet the whole day. They are not interested in their subjects. Its very dangerous for them!

The Internets advantages and disadvantages are shown clearly to us. I think we should make good use of it and stay away from the unhealthy websites. ​

【参考译文】

互联网的利与弊

互联网正进入我们的生活。它带给我们的不仅是方便，快乐，还有烦恼。一些学生使用互联网作为一个研究。他们查找单词的含义、句子的翻译形式、事件或故事的背景、公司或名人的信息等。

他们也阅读新闻或通过电子邮件发送电子邮件。因特网帮助他们学得更多，学习更好。

另一方面，一些学生整天在网上玩游戏，和朋友聊天，看电影，甚至看不健康的电影。他们对自己的科目不感兴趣。对他们来说非常危险!

互联网的优点和缺点都清楚地显示给我们。我认为我们应该好好利用它，远离那些不健康的网站。

Recently, the news that U.Sattack on Chinas Internet is always exposed. And the question of how to stayonline safely raises a lot of discussion in our country. As a result, in theera of rapid development of network, we must take measures to protect oursecurity of privacy and property effectively.

最近的新闻都揭示了美国对中国互联网的攻击。如何安全地上网在我国引起了大量的讨论。结果是在网络飞速发展的时代，我们必须要采取有效的措施来保护我们的隐私和财产安全。

From my perspective, in the firstplace, we should call attention to our personal information. Not only do we not offer them at random in some strange websites, but we need to distinguish right from wrong among the numerous websites. Furthermore, it is inevitable that somesecure anti-virus soft wares can be installed. And it will make it possible for that network can run more steadily. In addition to doing some work byourselves, the government needs to draw up some policies to preserve nationalcyber security. It involves probing for deeply rooted reasons, devising creative solutions, developing high-tech talents and strengthening thesupervision.

从我的角度来看，首先，我们应该关注我们的个人信息。我们不仅不随随便便在一些奇怪的网站提供自己的信息，而且我们需要在众多的网站之间明辨是非。此外，安装一些安全的杀毒软件是必须的。这使得网络运行更加稳定。除了我们自己该做一些努力之外，还需要政府制定相关政策来保护国家网络安全。这就涉及到探究深层次的原因，想出有创造性的解决方案，发展高新技术人才、加强监管。

Although scientists still cannot overcome the problem completely, they are studying a great deal about how to protect our national cyber security. However, consciousness of cyber security should not decline. Only in this way, we just enjoy the convenience brought by the network.

尽管科学家仍无法完全克服这个问题，但是他们正在研究大量关于如何保护我们国家网络安全的办法。然而，不应该放松网络安全意识。只有这样我们才能享受到网络带给我们的便利。

Social Network 社交网络

A social network is a social structure made up of inpiduals (or organizations) called "nodes", which are tied (connected) by one or more specific types of interdependency, such as friendship, kinship, common interest, financial exchange, dislike, sexual relationships, or relationships of beliefs, knowledge or prestige.

社会网络是是由个人（或组织）构成的社会结构称为“节点”，是一个或多个相互依存的具体类型连接起来的，比如友情，亲情，共同的利益，金融交易，厌恶，性关系，信念，知识或声望。

Social Networks are groups of people who share interests and who interact in a variety of ways via software on websites. These include file-sharing, chatting, messaging, exchanging photos/video etc. Social network sites are usually free to join. Include Myspace,Facebook,Bebo,Orkut,LinkedIn and so on.

社会网络是通过网站软件分享共同兴趣，通过各种方式进行互动的一个群体。这些包括文件共享，聊天，信息传送，交换照片/视频等。社交网站是免费加入的。包括聚友网，脸谱网，贝博网，我酷，商务化人际关系网等。

We define social network sites as web-based services that allow inpiduals to construct a public or semi-public profile within a bounded system, articulate a list of other users with whom they share a connection, and view and traverse their list of connections and those made by others within the system. The nature and nomenclature of these connections may vary from site to site.

我们定义了社交网站为网络服务，允许个人在一个固定的系统构建公共或半公共的轮廓，阐明了一个和他们共享一个连接的其他用户名单，并查看，连接其他系统内的列表。不同的站点这些联系的性质和命名可能会有所不同。

The Importance of Social Networking

社会网络的重要性

Social networking can help a business gain contacts, clients, and increased public awareness.

社会网络可以帮助企业获得联系，客户，和提高公众意识。

Even entrepreneurs who run small businesses from their homes can take advantage of this resource to set up a global presence.

即使是经营很小的家族企业的企业家，也可以利用这一资源，建立全球性。

To make the most of social networking, its important to fully understand the concept of social networking and how it can be applied in ways that will help you grow your business.

利用社会网络，重要的是要充分了解社会网络的概念以及它是如何应用的，这将有助于你事业的成长。

Social networking is making its mark in history these days. In fact, it is progressing so fast, it is leaving the news media in the dust. Everyday people are reporting news faster than a whole news team.

目前社交网络努力在历史上留下印记。事实上，它发展得如此迅速，新闻媒体都落后于它。人们每天报道的新闻比整个新闻团队的还要快。

As a product of modern computer and the Internet, online games have become very popular among college students. Many students have enjoyed great pleasure and satisfaction from these games. But as we see, some students lacking self-discipline are too much indulged in these games so that their health and academic performances are affected. This phenomenon has caused much worry from the teachers and parents.

However, some others argue that online games are not always harmful. They can train the ability of youngsters to respond to things quickly. Moreover, they can stimulate their imagination and their interest in computer science. More importantly, it does bring college students much pleasure and release their pressure greatly.

From my point of view, online games are a wonderful entertainment if you play them in a clever way. When they interfere too much with your study, it is better for you to give them up at once. But if you have enough self-control over them, you can certainly obtain real pleasure and benefit a lot from them.

作为现代计算机和互联网的产物，网络游戏已经在大学生中很流行。许多学生都已经从这些游戏中获得了快乐和满足。但是我们看到，一些缺乏自律的学生沉迷于网络游戏，影响了他们的健康和学习成绩，这种现象引起了许多老师和家长的担忧。

然而，有些人认为网络游戏并不总是有害的。他们可以培养青少年的快速响应能力。此外，还可以激发他们的想象力和他们对计算机科学的兴趣。更重要的是，它给大学生带来快乐并且很好地释放他们的压力。

从我的角度来看，如果你发挥他们的聪明的作用网络游戏是一个很好的娱乐。当它对你的学习干扰太多时，你最好马上放弃它。但是如果你有足够的自我控制能力，你就能得到真正的快乐，并从中受益很多。

Every coin has two sides , which is the same as surfing the Internet. On one hand , we benefit a lot from computers. For instance , many people are accustomed to going shopping on the Internet, which is a way to save time and money. What’s more, Internet makes it convenient for friends and relatives to communicate with each other. So people are more closed. Besides, we can go through the news all over the world through the Internet, which can broaden our eyes and assist us to learn more about the world.

On the other hand, with the popularity of computer games, more and more teenagers are addicted to virtual world , leading to a terrible grade and health. Moreover, plenty of unhealthy information emerges on the Internet, making a bad influence on teenagers.

I have a good friend. His name is Chin Daibe. He is 15 years old. We both want to be detectives. He is very clever.

He is just a secondary school student but he is cleverer than any other student. I think he is as clever as a university school student. His favorite detective is Kindalchi Hajime. He wants to be just as famous when he grows up. He is as helpful and brave as Sherlock Holmes. He is generous to his friends, too. When he has some new detective books, he always shares with me. So I am willing to lend him books, too. His favorite writers are Jinguchi Lanbu and A.E.W. Mason. His favorite book is "At the Villa Rose".

I think it is a good detective book, too. I really think he will be a very good detective. He is my best friend.

导语：随着互联网的发展，网站慢慢取代了报纸的作用，下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

报纸

1.传统媒体，天天更新，信息可靠 2. 携带方便，随时随地可以阅读 3.仅有文字和图片

网站

1.新兴媒体，信息更新速度快 2.依赖于电脑及互联网 3. 包含文字、图片、音频和视频

注意：

1.短文必须包括表中所有内容，可以适当发挥; 2. 词数：100-120 3. 参考词汇：更新update;音频audio;视频video

Newspapers and Websites

Newspapers and websites are two major new media in the world today, both of which can provide us with lots of news and information. But theyre different in some ways.

Newspapers enjoy a longer history and often come out daily with more reliable news and information. They can be carried and read almost anywhere you like. So many people like reading them. But they can only contain texts and photos.

On the other hand, websites are quite new and popular, especially among young people. Websites have not only texts with pictures but also audios and videos, which makes stories more interesting. Whats more, they are updated from time to time. So the latest news is always seen on websites instead of in newspapers. But it is not quite convenient for people without a computer connected with the Internet to get information from websites.

【参考译文】

报纸和网站

报纸和网站是当今世界上的两大新兴媒体，它可以为我们提供大量的新闻和信息。但他们在某些方面不同。

报纸有着较长的历史，每天都会出现更可靠的新闻和信息。他们可以携带和阅读几乎任何地方你喜欢。这么多人喜欢读。但它们只能包含文本和照片。

另一方面，网站是新的和流行的，尤其是在年轻人。网站不仅有图片文字，还有音频和视频，这使得故事更有趣。更重要的是，他们不时更新。所以最新的新闻总是出现在网站上而不是报纸上。但是没有电脑连接的人从网站上获取信息并不太方便。

With the development of economy, an increasing number of people (more and more people) appreciate role in our lives and has been used in many fields. Whats more, it has even entered the homes of ordinary people. it also helps us communicate with overseas friends more effectively.

Obviously, different people have got different attitude about the internet. There are some possible reasons for the present situation. Some people think that the internet also do harmful thing to our human beings. In the first place, some people poured most of their energy in chatting on internet. it wastes much time and money. In the second place, some people watch the sexual pictures and movies on internet, which makes them down. Last but not lease, they are out of the business. the lack of physical exercise is due to the fact that people spend too much time on internet.

[网络利与弊英语作文

Rock kingdom is my favorite online game.

The rock kingdom is a childrens game created by tencent, which is suitable for children aged 8 to 14. This game is mainly with their pets and other pet upgrade combat experience, full of class is the class of 100, you can also use "Locke" buy ordinary, intermediate, advanced, three kinds of guru, eleven honor the ball, star ball, demon balls, a fool, and VIP exclusive super guru ball, such as the other pet hit less blood, capture with guru ball have a chance of failure.

My pet has more than 100, of which the powerful are: the class of 100 elk, Luo Yin of grade 100, grade 100 royal griffins, class of 100 top cat, class of 100 ice wing ahriman, the class of 100 Roman abramovich, the class of 100 shaolin croak, class of 100 pirates mummies, class of 100 giant LingShi, this is my pet is better.

There are eight badges, namely eight guardians, the first one is a grass of Roland, drainage of lele, fire department koren, crains brother, stone in the department of toby, ice frozen knight, sander, lightning wings leno, deep and remote system Lucia, this is the eight badges.

Every Friday comes new pets, new tasks and new activities. Come on, look forward to it!

This is the kingdom of rock, a world full of joy, passion, and courage.

Just as what is shown in the picture，a girl is asking a question online. Answers from different netizens differ so greatly that the girl is very confused about whom she should follow. It is obvious that it is becoming a fashion for people to ask questions online when confronting a dilemma.

The implication implicit in the drawing can be elaborated as follows. On the one hand， the Internet has provided us with great convenience. For example， we can get knowledge about nearly all aspects on the Internet with only several keyboard commands and a few clicks of the mouse through search engines such as Baidu and so on. On the other hand， with an explosive amount of information on the Internet,it can be difficult to tell good information from bad. For example， teenagers and adolescents may mistake the bad information online as good， the result of which can be rather devastating. Some dirty information on the net may exert negative impacts on people.

In conclusion， on the one hand， it is important for us to take full advantage of Internet to enhance our efficiency and save our time. On the other hand， effective steps should be taken to educate people to avoid and elude inappropriate and even wrong data online so as not to be misguided. Only in this way can the net better serve for our life， study and work.

As we all know, the 21st century of the Internet. With the development of the Internet, more and more people begin to use it to enjoy themselves or do something special. However, every coin has two sides , the Internet also has its own advantages and disadvantages.

Our life has a great change since we use the Internet. We benefit a lot from the Internet. As for me, I am accustomed to going shopping on the Internet, which is a good way to save my time and money. Many people do the same as me. What’s more, the Internet makes it convenient for us to make friends and get people closed . We can also go through the news all over the world. The Internet not only broaden our view but also assist us to know more about the world . On the other hand , more and more teenagers are addicted to virtual world and they all play computer games everyday they want, leading to a terrible result.

In conclusion, we should have selective using the Internet and keep away from the virtual world. Don’t always use the Internet to chew the fat and do something meaningful.

[网络的坏处英语作文