名词
中文翻译：齿轮比
同义词：
['gear ratio', 'gear ratio', 'gear ratio', 'gear ratio', 'gear ratio']
例句：
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1. The engine's efficiency is directly related to the gear ratio.
发动机的效率与齿轮比直接相关。
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2. In a car, the gear ratio determines how quickly the engine can shift gears.
在汽车中，齿轮比决定了发动机可以多快换挡。
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3.The engineer adjusted the gear ratio to improve fuel efficiency.
工程师调整了齿轮比以提高燃油效率。