名词
中文翻译：备用设备
同义词：
['backup equipment', 'spare parts']
例句：
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1.We need to have spare equipment in case of emergency.
我们需要备有备用设备以防万一。
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2.The company has spare equipment for its employees to use during maintenance.
该公司为员工提供了备用设备，以便在维护期间使用。
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3.The spare equipment was used to repair the damaged machine.
备用设备被用来修理损坏的机器。