engine的意思是什么

例句：

My car had to have a new engine.

我的汽车得换一个新发动机。

The engine is used for pumping water out of the mine.

这台发动机是用来从矿井中抽水的。

The performance of the engine was tested at different settings.

对引擎的性能在不同的挡上做了试验。