to flag down
[phrase form: flag]
01
挥手示意停下, 拦车
to signal a vehicle to stop, often by using hand gestures
例子
The taxi driver noticed them trying to flag him down and stopped to pick them up.
出租车司机注意到他们试图招手拦车，于是停下来接他们。
Flag down
01
扔旗, 旗语信号
a situation in lacrosse where a penalty is called, indicated by the referee throwing a flag onto the field
例子
Players should immediately stop when they see a flag down on the field.
当球员在场上看到旗子落下时，应立即停止。
