名词
中文翻译：曲柄机构
同义词：
['crank', 'crankshaft', "gearbox例句：1. The car's engine is powered by a crankshaft that turns the wheels.（这辆车的引擎由一个曲柄轴驱动，使车轮转动。）"]
例句：
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1. The car's engine is powered by a crankshaft that turns the wheels.
这辆车的引擎由一个曲柄轴驱动，使车轮转动。
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2.The old clock had a crankshaft that was worn out and needed to be replaced.
旧钟表有一个磨损的曲柄轴，需要更换。
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3. The engineer used a crankshaft to turn the gears of the machine.
工程师使用曲柄轴来转动机器的齿轮。