traffic Signal
红绿灯的英文traffic light。
例句：
1、所以当你下次不耐烦地等红绿灯的时候，别对他们那么生气，他们肯定已经走了很长一段路了。
So next time you are impatiently waiting at a traffic light, don't get so mad at them, they've certainly come a long way.
2、对于大部分人来说，这次革命的意义在于，现在电脑是普遍存在的，到处都是。穿过红绿灯的时候，可能有计算机控制着。
The revolution to most people is that computers today are. They're everywhere. If you are crossing at a traffic light, there probably is a computer controlling that traffic light.
3、顺着这条街一直走到红绿灯处。
Go straight along this street to the traffic light.
4、直着走到红绿灯，然后左拐，你会看到一个广场。
Go straight until you reach the traffic light, then turn left and you will see a square.
5、我们发明了汽车，又一不小心搞砸了很多次--发明了红绿灯，安全带和安全气囊。
We invented the car, screwed up a bunch of times--invented the traffic light, the seat belt and the airbag.