例句：

　　My car had to have a new engine.

　　我的汽車得換一個新發動機。

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

　　這臺發動機是用來從礦井中抽水的。

　　The performance of the engine was tested at different settings.

　　對引擎的性能在不同的擋上做了試驗。