信号灯

• The car came to a full stop at the traffic lights
  汽车在交通信号灯处停住了
• Aeronautical ground light and surface marking colours
  航空用地面信号灯和色标
• Why are stoplights red , yellow and green
  为什么交通信号灯采用红、黄、绿色？
• I ' d better run so i can make the light
  信号灯还没变（红）之前，我最好赶快跑过去。
• The traffic lights changed from red to green
  那个交通信号灯由红色变成绿色。
• The design of intelligent signal lamp control system
  智能信号灯控制系统设计
• Technical specification for railway hand signal light
  铁路手信号灯技术条件
• Cylindrical columns for traffic lights ; measures
  交通信号灯用圆电杆.尺寸
• Most big crossroads have traffic lights
  有些比较大路口会有行人信号灯。
• Shipbuilding - portable daylight signalling lamps
  造船.便携式昼间信号灯