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。