Microscopic infectious agent of DNA or RNA needing host cells.

• Can cause disease in animals, plants, or bacteria.

只能在活细胞内复制的微小传染因子。

• 由DNA或RNA和蛋白外壳组成，可致病。

Malicious program that replicates itself and spreads between computers.

• Often damages systems, data, or performance.

能自我复制并在计算机间传播的恶意程序。

• 常破坏系统、数据或性能。

Something harmful that spreads quickly through a group or society.

• A contagious idea, rumor, or influence.

在群体或社会中迅速蔓延的有害事物。

• 具有传染性的观念、谣言或影响。

To infect a computer or device with a virus.

• To send malware that replicates on a target system.

用病毒感染计算机或设备。

• 向目标系统发送会自我复制的恶意软件。