stop sb.'s mouth

例句：

1. 1. The traffic stopped for the policeman's signal.
   警察的手势让交通停了下来。
2. 2. He stopped talking when he saw her.
   他一看到她就停止了谈话。
3. 3. The car stopped at the traffic light.
   汽车在红绿灯前停了下来。