挥手示意

The police had set up a roadblock and waved several drivers down.

设下路障并挥手示意几位司机停车。

The policeman waved the vehicle on.

察挥手示意那辆车继续前进。

I was driving along quite happily when a policeman waved me down.

我正在愉快地驱车前, 这时一名察挥手示意我停下来。