We had to drain the oil out of the engine.

我们必须把发动机里的机油全部放掉。

《牛津词典》

Regular servicing guarantees the smooth operation of the engine.

定期维修可保持发动机的顺畅运转。

《牛津词典》

Unlike the blades on old-fashioned propeller engines, these blades spin around at the back of the engine.

与老式螺旋桨发动机的叶片不同，这些叶片在发动机的后部旋转。

youdao

Yet the sound of the engine made everything seem warm and safe.

VOA: special.2009.03.18

So you know, what the second law is doing, in other words, it's putting these restrictions on how well or how effectively we can convert heat into work in the case of the engine, or work into heat extracted in the case of a refrigerator.

你们知道，在热机中，热力学第二定律的作用，换句话说，就是给热量,转化为功的效率,施加限制,或在制冷剂中，对抽取热量,进行限制。

麻省理工公开课 - 热力学与动力学课程节选

We did that, we came up with very good Chinese search engine technology, and we signed up a lot of the Chinese portals in a very short period of time.

我们开发了,很好的中文搜索引擎技术，并在短期内，和许多门户网站公司,签了合约。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

Even above the sound of the engine I can hear the insistent high-pitched zither of crickets.

BBC: Sardinia, land and sea

The economy is really not receiving any support from any cylinders of the engine.

BBC: US recession forecast to drag on

The large center air inlet further optimizes cooling of the engine and the front brakes.

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