名词
中文翻译：齿轮对
同义词：
['gearset', 'gear assembly', 'gear set例句：1. The car needs to have its gears checked before it can be driven.（这辆车在被驾驶之前需要检查其齿轮。）2. The engineer used a special tool to adjust the gears on the machine.（工程师使用特殊的工具调整机器上的齿轮。）']
例句：
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1. The car needs to have its gears checked before it can be driven.
这辆车在被驾驶之前需要检查其齿轮。
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2. The engineer used a special tool to adjust the gears on the machine.
工程师使用特殊的工具调整机器上的齿轮。
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3.The gears of the transmission were so tight that they could not be shifted without using force.
变速器的齿轮非常紧，如果不用力就无法换挡。