Really, they're just emphasizing in a relatively slick presentation the fact that the police can sort of sit in an air-conditioned office and remotely monitor someone without them having any idea that it's going on.
事实上，他们只是强调， 通过一个简单的演讲， 警察可以坐在空调办公室里， 警察可以坐在空调办公室里， 远程监控某些人， 而被监视的人却无从所知。