名词
中文翻译：警戒光束
同义词：
['警戒线，警戒光例句：1. The guard beams are designed to prevent trespassers from entering the restricted area.（这些警戒光束旨在防止未经授权的人员进入受限区域。）2. The security system uses a guard beam to monitor the perimeter of the building.（这个安全系统使用一个警戒光束来监控建筑物的外围。）']
例句：
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1. The guard beams are designed to prevent trespassers from entering the restricted area.
这些警戒光束旨在防止未经授权的人员进入受限区域。
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2. The security system uses a guard beam to monitor the perimeter of the building.
这个安全系统使用一个警戒光束来监控建筑物的外围。
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3. The guard beam was activated when the alarm went off, alerting the guards to potential danger.
警报响起时，警戒光束被激活，警告警卫有潜在危险。