名词
中文翻译：无电压报警器同义词
同义词：
['null voltage alarm', 'no-voltage device']
例句：
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1. The new alarm system detects the presence of intruders without requiring a power source.
新的报警系统在不依赖电源的情况下就能检测到入侵者的存在。
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2. The alarm went off when the door was opened unexpectedly.
门被意外打开时，警报器响了。
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3. The alarm company is responsible for monitoring and testing the security systems in the area.
该报警公司负责监控和测试该地区的安全系统。