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1.The car has a stepped gear system that allows for smooth acceleration and deceleration.
这辆车有一个阶梯式齿轮系统，可以平滑地加速和减速。
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2.The new transmission uses stepped gears to improve fuel efficiency.
新型传动装置使用阶梯式齿轮来提高燃油效率。
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3. The engineer designed the gears with stepped ratios to optimize performance.
工程师设计了具有阶梯比的齿轮，以优化性能。