它通过寻找计算机病毒的“签名”(已知计算机病毒代码的标本)来做这件事情。

It does this by looking for virus "signatures" - chunks of computer code from known viruses.

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如果病毒像生物那样生长，它们将搜索被感染系统中的其他病毒，并与他们交换代码，然后繁殖全新的后代。

As the viruses grow more lifelike, they could search for other viruses in the infected system with which they can swap code and create new offspring.

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从Web上偶然下载的病毒和其它敌意代码可能造成严重的安全性危险。

Viruses and other hostile code accidentally downloaded from the Web can pose serious security risks.

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