名词短语
中文翻译：每单位零件的备用部分
同义词：
['备用零件，备用部件例句：1. The car has a spare part for the engine that can be replaced quickly.（这辆车有一个可以快速更换的发动机备用件。）2. The manufacturer offers spare parts for all models of the car.（制造商为所有型号的汽车提供备用件。）']
例句：
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1. The car has a spare part for the engine that can be replaced quickly.
这辆车有一个可以快速更换的发动机备用件。
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2. The manufacturer offers spare parts for all models of the car.
制造商为所有型号的汽车提供备用件。
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3.The mechanic checked the car's engine and found a spare part that needed to be replaced.
机械师检查了汽车的引擎，发现需要更换一个备用件。