a signal that controls the traffic on a road, by means of red, orange and green lights that show when you must stop and when you can go
- 控制道路上交通的信号灯（a signal that controls the traffic on a road）
- 通过红色，橙色和绿色的灯（by means of red, orange and green lights ）
- 告诉你什么时候该停下来，什么时候该走（ that show when you must stop and when you can go）
转发、关注可私信获取“高清版脑图文件”根据艾宾浩斯记忆原理，请复习单词：人教精通版小学《英语》
