名词
中文翻译：测试开关
同义词：
['testing switch', 'test switch', 'test unit例句：1. The engineer tested the new machine before it was put into use.（工程师在机器投入使用前对其进行了测试。）']
例句：
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1. The engineer tested the new machine before it was put into use.
工程师在机器投入使用前对其进行了测试。
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2. The test switch is used to ensure that the circuit is working properly.
测试开关用于确保电路正常工作。
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3. The test switch was designed to detect any faults in the electrical system.
测试开关被设计用来检测电气系统中的任何故障。