我们应该警惕计算机病毒。 We should be watchful of computer viruses.
计算机病毒的一种主要特性。 A main feature of computer virus.
计算机病毒的一种特性,它是病毒从一个系统进入另一个系统的唯一途径。 A feature of computer virus that is the unique channel by which viruses can enter from one system into another system.
计算机病毒这一名词起因于在计算机上传染的有害程序与生物学中病毒的相似性。 The cause of the term "computer virus" is the likeness between the biological virus and the evil program infected with computers.