名词
中文翻译：球轴承同义词
同义词：
['ball bearing', 'bearing']
例句：
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1. The ball bearings in the machine are all worn out.
机器里的球轴承都磨损了。
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2. The engineer carefully checked the ball bearings before starting the machine.
工程师在启动机器前仔细检查了球轴承。
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3. The ball bearings are crucial components of the machine's operation.
球轴承是机器运行的关键部件。