名词
中文翻译：监控系统
同义词：
['security system', 'surveillance system', 'monitoring system']
例句：
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1. Thesecurity guard was watching the entrance closely to prevent any unauthorized access.
保安严密监视入口，防止未经授权的进入。
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2.The company installed a new surveillance system to improve its safety measures.
公司安装了新的监控系统以增强其安全措施。
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3. The police department is using a surveillance system to monitor public gatherings for potential threats.
警察局正在使用监控系统来监控公共集会，以防潜在威胁。