名词
中文翻译：车轴
同义词：
['axle', 'shaft', 'wheel axle']
例句：
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1. The car was so old that the axle broke.
这辆车太旧了，轴断了。
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2. The engineer carefully checked the axle before starting the engine.
工程师在启动发动机前仔细检查了轴。
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3. The new model of the train has an improved axle design.
新型号的火车采用了改进的轴设计。