你是说那个红黄绿闪烁的东西吗？

You mean the red-yellow-green blinking thing?

youdao

在城市主干道约500个红绿灯路口安装了盲人过街音响信号装置，350个路口安装了行人灯绿闪倒计时器。

All of them are paved with blind paths and stone ramps. 500 main intersections are installed with sound devices to guide the blinds. 350 intersections are installed with green light count down device.

youdao

在城市主干道约500个红绿灯路口安装了盲人过街音响信号装置，350个路口安装了行人灯绿闪倒计时器。

All of them are paved with blind paths and stone ramps. 500 main intersections are installed with sound devices to guide the blinds. 350 intersections are installed with green light count down device.

youdao