计算机病毒 英语作文,计算机病毒-------英文文献翻译

内容介绍

What are computer viruses?

According to Fred Cohen’s well-known definition, a computer virus is a computer program that can infect other computer programs by modifying them in such a way as to include a (possibly evolved) copy of itself. Note that a program does not have to perform outright damage (such as deleting or corrupting files) in order to be called a “virus”. However, Cohen uses the terms within his definition (e.g. “program” and “modify”) a bit differently from the way most anti-virus researchers use them, and classifies as viruses some things which most of us would not consider viruses.

Computer viruses are bits of code that damage or erase information, files, or software programs in your computer, much like viruses that infect humans, computer viruses can spread, and your computer can catch a virus when you download an infected file from the Internet or copy an infected file from a diskette. Once the viruses is embedded into your computer’s files, it can immediately start to damage or destroy information, or it can wait for a particular date or event to trigger its activity.

What are the main types of viruses?

什么是计算机病毒？

按照Fred Cohen的广为流传的定义，计算机病毒是一种侵入其他计算机程序中的计算机程序，他通过修改其他的程序从而将(也可能是自身的变形)的复制品嵌入其中。注意一个程序之所以成为“病毒”，并非一定要起彻底的破坏作用(如删除或毁坏文件)。然而，Cohen在他的定义(即“程序”和“修改”)中使用的“病毒”这个术语与大多数反病毒研究人员使用的“病毒”术语有些差别，他把一些我们多数人认为不是病毒的东西也归类为病毒。

计算机病毒是一些能破坏或删除计算机中的信息、文件或程序的代码。正如感染人体的病毒一样，计算机病毒能够扩散。当你的计算机从互联网上下载一个被感染的文件，或者从磁盘上复制一个被感染的文件时，你的计算机就会染上病毒。而一旦病毒进入到你的计算机文件中，它就能马上破坏或摧毁其中的信息，或者等到某个特殊的日期或事件来临时才触发其破坏活动。