mechanisms

These automatic cameras have a special focusing mechanism.

这些自动相机有特殊的对焦装置。

The mechanism for collecting taxes needs revising.

收税制度需要修改。

She's actually kind of insecure, and her rudeness is just a defence mechanism.

她其实很缺乏安全感，她的粗鲁不过是出于防卫心理。