名词
中文翻译：减速器
同义词：
['reducer', 'governor', 'throttle']
例句：
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1. The car's speed reducer is designed to slow down the engine.
汽车的减速器设计用来减缓引擎的速度。
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2. The engineer used a speed reducer to control the flow of oil through the gearbox.
工程师使用一个减速器来控制油通过齿轮箱的流量。
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3. The speed reducer was responsible for reducing the vehicle's acceleration from 60 mph to 40mph.
减速器负责将车辆从60英里每小时加速到40英里每小时。