名词
中文翻译：主轴
同义词：
['central shaft', 'main shaft']
例句：
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1.The car's mainshaft is broken, so we need to replace it.
汽车的主轴断了，我们需要更换它。
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2.The engineer checked the mainshaft of the machine before starting work.
工程师在开始工作前检查了机器的主轴。
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3.The technician had to dismantle the mainshaft to repair the engine.
技术人员不得不拆卸主轴来修理发动机。