名词
中文翻译：发动机
同义词：
['engine', 'motor', 'drive']
例句：
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1. The car's engine is sound and efficient.
这辆车的发动机声音好，效率高。
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2. The new model car has a powerful motor.
新款汽车有一个强大的马达。
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3. The old bus had a small motor that could only run for a short distance.
旧公共汽车有一个小马达，只能跑很短的距离。