Patrol volunteers would communicate down alleyways and narrow lanes via coded signals that they would flash from the lights of their mobile-phone screens.
自愿参加巡逻的人员在过道和窄巷中利用手机屏幕发出的闪光以编码信号的方式进行交流。
The Mobile Detection Assessment and Response System (MDARS) was developed to take inventory and patrol for intruders in high-security areas such as weapons depots.
移动检测评估和响应系统(MDARS)是发达国家采取清查和巡逻入侵者在高度安全的领域，如武器库。
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