名词中文翻译
中文翻译：单引擎
同义词：
['single-engine', 'single-unit engine']
例句：
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1. The new car has a single engine, which is quiet and efficient.
这辆新车有一个单引擎，噪音小且效率高。
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2. The old bus had a single engine, but it was not as powerful as the new one.
那辆旧公共汽车有一个单引擎，但它不如新公共汽车那么有力。
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3. The train only has one engine, so it can't go very fast.
火车只有一个引擎，所以它不能跑得很快。