急求一篇关于计算机用途的英语短文

关于电脑用途的英语作文~

范文1.Computers

　　It is known to us all that the computer is the most important invention in the 20th century. It has been developed a lot since it appeared. Also, our daily life has greatly changed because of it.

　　A computer can think and remember things like man, but it is millions of times faster than human begins. As a result, computers have been used in the fields of agriculture(农业), industry(工业), education(教育) and so on. For example, we can learn our lessons at home by using a computer instead of going to school.

　　Computers have entered our daily life. So it is important for us to learn how to use a computer. And we must start right now.

　　范文2：Computers

　　The computer is a wonderful machine. They are already widely used in industries and in universities. They are used in many ways.

　　Computers can do many kinds of work. For example, computers can helps us do maths problems quickly. Some problems are too hard for us to work them out, but computers can. A scientist can ask computers some questions, and the computers can answer on the screen.

　　In a car-factory computer tells the robots how to do with the cars.

　　Computers are very useful. So many parents buy computers for their children. They hope computers can help them improve their studies in school, but some children don’t do as what parents want them to do. Because they used the computers for surfing on the Internet and spend too much time playing computer games instead of learning. It does not good for their eyesight. So their parents complain about computers not help children to study but also make them fall behind.

　　In many companies computers instead of workers to work. So many people lose their jobs. So many workers think computers bring them a lot of trouble.

　　If computers are good for us or bad for us it’s hard to say so I hope computers will be used in the right way.

　　2).介绍因特网（Internet）的主要用途：

　　信息：看国内外新闻、获取其他信息；

　　通讯：发e-mail、打电话；

　　学习：上网上学校、阅读各种书籍、自学外语；

　　娱乐：欣赏音乐、观看体育比赛、玩棋牌游戏；

　　生活：购物、聊天（have a chat）、交友。

　　On the Internet

　　The Internet is becoming more and more important in our daily life. On the net, we can learn news both at home and abroad and all kinds of other information as well. We can also send messages by e-mail, make phone calls, go to net school, read different kinds of books and learn foreign languages by ourselves. Besides, we can enjoy music, watch sports matches and play chess or cards. On the net, we can even do shopping, have a chat with others and make friends with them. In a word, the Internet has made our life more colourful.

Computer, the technological product of the twentith century, due to its mutipurpose functions, one can using it for data processing, audio visual, recreational and educational and net surfing, thats why today almost every home has a computer. For me, I uses my computer for playing games, education and net surfing. Although I find out computer is very useful for me but it also has its darker side, some time I am so hook on to the game and forget everything else, that is forgot my homework, missing my resting and dinner time. But nevertheless, if I can control myself it is very useful tool as well, particular every aspect of todays life is computerize, so love it or hate it, we have no choice。

Internet Virus Spreads 网络病毒的传播
Experts on cyberspace say the much feared code red computer 1)worm continues to spread through the internet. But so far, the electronic bug that was being considered a global threat to internet 2)traffic seems to have had little 3)impact.

No significant disruptions to traffic on the web have been reported since the code red bug was 4)unleashed early Wednesday. But experts warn the threat may be far from over. Bill Jones, the spokesman of California's Keynote Systems, the company which helps businesses with e-commerce ‘I haven’t said anything so far that we call unusual, but we certainly would… But the FBI says the code red worm is still spreading and has the potential to infect internet sites and cause 5)significant disruption to traffic on the world wide web.

"I would expect that the worm has probably not run its course. I would think that because it is a 6)geometric progression, as it infects machines and they infect other machines, you have the opportunity to see a slowdown over time. To have expected something immediately at 0000 UTC Wednesday I think was 7)unrealistic but over the next 24 hours and next few days we could certainly see a slowdown."

Last month, the worm attacked more than 350,000 computer systems running on Microsoft operating systems - including the White House website - and prompted the Pentagon to shut down sites then as well. But it seems that the advice issued by the FBI and cyber industry leaders for internet users to take precautions may have paid off. So far, more than a million people have downloaded a so-called 8)patch from Microsoft's website that prevents computers from being infected.

注释：

(1) worm [w:m] n.虫, 蠕虫

(2) traffic [5trAfIk] n.交通, 通行, 运输, 贸易, 交通量, 交易, 交往, 通信量

(3) impact [5ImpAkt] n.碰撞, 冲击, 冲突, 影响vt.撞击, 压紧, 对...发生影响

(4) unleash [Qn5li:F] v.释放

(5) significant [sI^5nIfEkEnt] adj.有意义的, 重大的, 重要的

(6) geometric progression n.[数]等比级数

(7) unrealistic [QnrIE5lIstIk] adj.不切实际的, 不实在的

(8) patch [pAtF] n.修补程序

转载的~~~~~
还有几个
Compter Networks
Modem networking applications require a sophisticated approach to carrying data from one machine to another. If you are managing a machine that has many users, each of whom may wish to simultaneously connect to remote hosts on a network, you need a way of allow-in them to share your network connection without interfering with each otherf~3. The approach that a large number of modern networking protocols use is called packet switching. A packet is a small chunk of data that is transferred from one machine to another across the network. The switching occurs as the datagram is carried across each link in the network. A packet-switched network shares a single network link among many users by alternately send-in packets from one user to another across that link.
When talking about TCP/IP networks you will hear the term datagram, which technical-lye has a special meaning but is often used interchangeably with packetE2~. In this section, we will have a look at underlying concepts of the TCP/IP protocols.
TCP/IP traces its origins to a research project funded by the United States Defense Ad-Vance Research Projects Agency (DARPA) in 1969. The ARPANET was an experimental network that was converted into an operational one in 1975 after it had proven to be a success.
In 1983, the new protocol suite TCP/IP was adopted as a standard, and all hosts on the network were required to use it. When ARPANET finally grew into the internet (with ARPANET itself passing out of existence in 1990), the use of TCP/IP had spread to net-works beyond the Intermit itself. Many companies have now built corporate TCP/IP net-works, and the Intermit has grown to a point at which it could almost be considered a main-stream consumer technology. It is difficult to read a newspaper or magazine now without see-in/reference to the Internet; almost everyone can now use it.
Another very important application in TCP/IP networks is NFS, which stands for Net-work File System. It is another form of making the network transparent, because it basically allows you to treat directory hierarchies from other hosts as if they were local file systems and look like any other directories on your hostc3J . For example, all users' home directories can be kept on a central server machine from which all other hosts on the LAN can mount them. The effect is that users can login to any machine and find themselves in the same home directory, Similarly, it is possible to share large amounts of data(such as database, documentation programs)among many hosts by maintaining one copy of the data on a server and allowing other hosts to access it.
Of course, these are only examples of what you can do with TCP/IP networks. We will now have a closer look at the way TCP/IP works. This information will help you understand how and why you have to configure your machine.
The World Wide Web is a hypertext-based system for finding and accessing Internet resources; it is a set of programs, standards, and protocols governing the way in which multimedia files are created and displayed on the Internet. It can provide access to a variety of Internet resources from the same interface ,including FTP, Gopher and Usenet newsgroups in addition to WWW sites.

作者： 218.200.247.* 2006-2-26 14:31 回复此发言

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2 计算机方面的英语资料，介绍一些计算机的英语短文，有兴趣的可以看
The World Wide Web is a distributed, multimedia and hypertext system, and thus a unique medium for communication and for publishing.
Documents for the WWW are written in HTML. The term is used to describe an interlinked system of documents in which a user may jump from one document to another in a nonlinear, associative way. The ability to jump from one document to the next is made possible through the use of hyperlinks. By click the hyperlink, the user is immediately connected to the document specified by the link. Multimedia files on the Internet are called hypermedia documents.
The explosion in use and popularity of Internet in the 1990s is most likely due to the graphics-intensive nature of the World Wide Web. Individuals, companies, and institutions use the Web in many ways. The most widely used tool on the Web is electronic mail, or E-mail, which is used to send written messages between individuals or groups of individuals, often geographically separated by large distances. As a very convenient and inexpensive way to transmit messages, E-mail has dramatically affected scientific, personal, and business communications.
World Wide Web has found application everywhere. E-commerce (business via the Internet) has grown out of businesses that started to advertise their presence via a Web site.
This has broadened into selling products and services, not only to customers but between businesses themselves. The costs of commercial transactions are negligible, compared with using the traditional distribution and retail network. What is more revolutionary is that the Web can lead to greater political involvement in decision making for ordinary people, via devoting systems.
Web technology has also been extended to handle conferencing and real time communications, to enable it to act like groupware, which facilitates people collaborating over a net-work, especially over an Intranet. The future of the World Wide Web is certain; it will survive and grow. What is uncertain is how it will affect other areas of everyday life.
Wireless Access System ( I )
With its advantages including the short construction period, dispensability with the laying of conduits and capability of both data and voice transmission, wireless access can partly or even entirely substitute for wire accessE13 . It is widely used by telecom carriers, which provide voice service largely, and newly emerging Internet service providers (ISPs) and potential local access providers as welled~ . The WA systems used in China have the following six types in terms of frequency bands used.
1. 450/460 MHz WA System: This system finds wide application in rural areas, re-mote suburbs, remote mountainous areas and islands. Some years ago, in order to achieve the objective of making every village accessible to telephone service, the Ministry of Posts and Telecommunications (MPT) extensively used WA systems of this frequency band, pro-mooting the rapid growth of the segments concerned TM . A dozen of manufacturers such ashamed, TCL and Dating produced such systems. However, since these are used mainly in rural areas, their economic efficiency is not as good as is expected. After China Telecom became an independent accounting unit, the development of WA service of this band began to slow down and face fierce competition. This band will not be reallocated; the government encourages telecom carriers to use it for rural communications.

作者： 218.200.247.* 2006-2-26 14:31 回复此发言

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3 计算机方面的英语资料，介绍一些计算机的英语短文，有兴趣的可以看
2. 1800 MHz WA System: This system uses 1800 - 1805 MHz and is based on TDD
modulation. Now only the S-CDMA WA systems developed by Dating and deployed in many
places (like Changing) by China Telecom use this band. Owing to the fact that Internet access and mobile terminals are not yet to be introduced, the growth of the relevant services impeded. Moreover, this band may possibly be withdrawn for the purpose of 3G generation mobile communications.
3. 1900 MHz WA System: This system is either based on FDD or TDD. The FDD-
based system uses 1880 ~ 1900 MHz/1960 ~ 1980MHz. It adopts CDMA, GSM and PACS.
Since these bands are inconsistent with those designated by the ITU for the use of 3G mobile
communications, in accordance with the regulations of the Radio Regulatory Bureau of theme, they can be used only in Beijing, Tianjin, Shanghai, Guangzhou, Shenzhen, Xiamen,Fuzhou,Chengdu and Chongqing by the year 2002 and will be withdrawn and reallocated after that.
The TDD-based WA system uses 1900~1920 MHZ and falls into two types: mobile and fixed. The mobile system, which adopts either PHS or DECT technology, is well known as the radio telephone and mobile phone. The TDD-based fixed WA system uses 1907~1915MHZ and both the CDMA/TDMA modulation modes. Now shanghai Bell produces Israel’s Beta-2000 system. This system is used in Ningxia province and part of Hunan province
Wireless Access System(Ⅱ)
4.Spread Spectrum WA System: This system uses 2400~2483.5MHZ/5725~5825MHZ and either direct spread spectrum modulation or hopping frequency spread spectrum modulation. It can be a normal point-to-point and point-to-multipoint spread spectrum data communications system or a wireless local area network(LAN), providing an emission power no more than 100 mw. The wireless LAN, also known as the wireless network bridge and wireless router , is mainly used for short-distance wireless data access to the Internet. With a directional antenna, the normal wireless spread spectrum data communications system provides a relatively long-distance transmission up to 5~10 kilometers. However, there being quite a lot of illegal systems in use within this frequency band, the electro-magnetic environment Is getting worse and interference occurs frequently. This has affected the further development of spread spectrum WA.
5. 3,5 MHz WA System: This system uses 3400 ~ 3430MHz/3500 - 3530MHz, ma-
inlay for midland and broadband WA. In view of the fact that the extended C-band for satellite communications also uses this band, and taking into account the potential trend of satellite communications, the 3.5 MHz WA is planned to use temporarily the frequencies of the2 x 30 MHz bandwidth. WA of this band is widely used in Europe whereas in the United States it is not open yet. Considering the limited frequency range that has been planned, theta -based WA system cannot use this band for the time being. It is estimated that each city or area can only accommodate a couple of WA operators eventually though many operators have made demand for the band. It is expected that the related frequency allocation and commercial experiments will be carried out in the first half of the year 2001.
6. Broadband WA: As demand for broadband services increases, recent years have seen the strong growth of broadband WA. People generally refer to the local multipoint distribution system (LMDS) as the broadband WA system. Because of its wide bandwidth, its frequencies can only be arranged in a higher band, which allows a short distance.
Generally speaking, because of its good propagation characteristics, the WA system un-deer 1000 MHz is suitable for rural areas, remote suburbs, mountainous areas and islands withal high cost of cable installation, a low teledensity and complex topography. The WA system above 1000 MHz can also serve as a means of installing telephone lines soon. Lacking for re-lasted global unified standards, the WA system is not able to provide roaming. So it is important to encourage the selection of appropriate technologies and systems for different subscribers in different areas and environments. Different WA systems may use different bands flexibly provided that they do not interfere with the operation of existing radio services.

I think the most helpful intention is the computer,The omputers were intented in 1976,
Computers are changing our life day by day. We can do many things on computers. For example, we can write articles, do office work and play games. But the most important usage of computers is to get on the Internet. We can do more things on the Intemet. We may do shopping, search information and communicate with people all around the world. In short,computers and Internet are making our life more and more convenient. omputers are nothing but machines. computers will never take the place of man.

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