It may even stop them from doing something stupid.
它甚至可以阻止他们做一些愚蠢的事情。
Doing this can also stop the mirror from fogging.
这样做还可以防止镜子起雾。
Like if people jump the traffic lights, I don't know why there isn't a camera at the traffic lights to stop people from doing that.
比如,为什么不在交通灯杆上安装监控摄像机来防止人们闯红灯呢?
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