名词中文翻译
中文翻译：下曲轴驱动齿轮
同义词：
['lower crankshaft gear', 'lower crankshaft gearbox']
例句：
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1. Theengine's performance is greatly improved by the use of this lower camshaft drive gear.
使用这种下曲轴驱动齿轮，发动机的性能得到了极大的提升。
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2.In the old days, this was a common part in many cars.
在旧时代，这是许多汽车中的常见部件。
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3.The engineer carefully adjusted the gear ratio to optimize the vehicle's efficiency.
工程师仔细调整了齿轮比，以优化车辆的效率。