signal lamp,或者signal light ,traffic lights 特指交通信号灯
信号灯
例句:
If something should go wrong, the signal lamp would light up.
万一发生什么事故,信号灯就会亮起来。
Stop when the signal light is red.
信号灯是红色时就停下来。
Traffic lights have been placed at all major intersections.
所有重要的交叉路口都安装了交通信号灯。
满意请采纳,谢谢!