这辆汽车是由一个四缸气冷式发动机驱动的。

The car was powered by a four cylinder air-cooled engine.

《柯林斯英汉双解大词典》

它要么是由发动机驱动的，要么是由收割者自己提供动力。

It is either engine driven, or powered by the harvestors themselves.

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火箭又长又细，上部有点粗，因为它的第二级比固体燃料火箭发动机驱动的第一级要厚。

The rocket is long and slender, and fatter on top because its second stage is thicker than its solid rocket motor-powered first stage.

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