名詞 green light:

1. a signal to proceed
   同義詞：go-ahead
2. permission to proceed with a project or to take action

1. At night, ships at sea carry a red light on the port side and a green light on the starboard.
   夜晚，在港口左邊一邊的海船上有紅燈，在右舷的船上有綠燈。
2. Before the traffic signal turns to green light don't cross the street.
   在交通信號輪換到綠燈以前不要穿過馬路。
3. The driver waited for the green light, his engine racing.
   那司機等候綠燈放行，讓發(fā)動機空轉(zhuǎn)著。