worm

The software promises to protect you from the most pervasive worm attacks.

该软件承诺保护您免受无处不在的蠕虫病毒的攻击。

It's distressing enough to find a worm in your apple but finding half of one is worse.

在苹果里发现一条虫子已经够让人厌恶了，如果发现半条就更糟了。