名词
中文翻译：机动车减速器
同义词：
['motor-driven speed reducer', 'motorized gearbox']
例句：
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1. The newcar has a motorized speed reducer that can reduce the engine's RPM quickly.
这款新车配备了一个可以快速降低发动机转速的电动机式减速器。
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2.The engineer used a motorized speed reducer to improve the car's acceleration performance.
工程师使用了一个电动机式减速器来提高汽车的加速性能。
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3. The motorized speed reducer is an essential component of the car's transmission system.
电动机式减速器是汽车传动系统的一个关键部件。