例句：

　　My car had to have a new engine.

　　我的汽車得換一個(gè)新發(fā)動(dòng)機(jī)。

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

　　這臺(tái)發(fā)動(dòng)機(jī)是用來(lái)從礦井中抽水的。

　　The performance of the engine was tested at different settings.

　　對(duì)引擎的性能在不同的擋上做了試驗(yàn)。