The teacher blew a whistle to start the race.
老师吹哨
开始了赛跑。
The teacher blew a whistle to start the race.
老师吹哨开始了赛跑。
The policeman whistled for the car to stop.
警察吹哨让汽
停下来。
The conductor blew his whistle, and the tram stopped.
售票员吹哨, 
停了下来。
明：以上例
、词
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