名词
中文翻译：差速器
同义词：
['differential gear', 'differential gearbox']
例句：
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1. Thedifferential rolls are responsible for the smooth movementof the vehicle's wheels.
差速器负责车辆车轮的平滑运动。
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2. The differentialrolls were designed to reduce wear and improveefficiency.
差速器的设计旨在减少磨损并提高效率。
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3. During the race, the car's differential rolls were adjusted to optimizeperformance.
比赛中，汽车的差速器被调整以优化性能。