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不知道你是否留意过马路上某些路口的黄色或红色信号灯?它们并不像普通的红绿灯那样向过往的行人车辆指示停止或通行,而是用一种闪烁变换的形式提醒人们在通过这一区域时要减速慢行,倍加留意。有这种信号灯的地
Do you not know whether you have noticed the yellow or red semaphores at certain junctions on the road? Instead of directing or stopping traffic pedestrians as usual traffic lights, they remind people of the passage of this Slow down the area, pay more attention. There is such a signal to the ground