发动机的一些部件由于不断使用而磨损了。

Parts of the motor wore out because of constant usage.

《柯林斯英汉双解大词典》

在对“极地海洋”号的主要柴油发动机的检查中发现，该船有33个汽缸组件被过度磨损。

Inspections of the Polar Sea's main diesel engines revealed excessive wear in 33 cylinder assemblies.

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发动机制造商称较30年前相比，他们发现这三年破车出现同样的凸轮轴磨损情况有所增加。

Engine builders say they have seen more broken motors suffering from the same camshaft damage over the past three years than in the previous 30.

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