名词
中文翻译：四冲程曲轴
同义词：
['four-stroke crankshaft', 'four-stroke engine crankshaft']
例句：
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1. Thecar's four-stroke crankshaft is responsible for its smooth operation.
这辆车的四冲程曲轴负责其平稳运行。
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2. Engineers are constantly working on improving the efficiency of their four-stroke crankshafts.
工程师们一直在努力提高他们的四冲程曲轴的效率。
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3. The four-stroke crankshaft in this model car is designed to be lightweight and efficient.
这款汽车的四冲程曲轴设计得既轻便又高效。