名词
中文翻译：曲柄轴
同义词：
['crankshaft', 'crankshaft assembly', 'crankshaft journal']
例句：
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1. The car's engine is running smoothly because the crankshaft is in good condition.
汽车的发动机运行平稳，因为曲柄轴状况良好。
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2. The mechanic replaced the crankshaft assembly after the engine overheated.
在发动机过热后，机械师更换了曲柄连杆机构。
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3. The crankshaft journal was worn out, requiring replacement.
曲柄连杆机构的轴承磨损严重，需要更换。