go green是什么意思

　　At first, railway companies used red to mean stop, white to mean go, and green to mean warn.

　　起初，铁路公司用红色表示“停车”，白色表示“前进”，绿色表示“警告”。

　　She had nothing to declare, and was starting to go through the 'Green' channel when she was stopped.

　　她没有什么要申报的，便开始进入绿色通道，结果就在这时被拦住了。

　　So she's still in her "go green" phase?

　　她依然停留在“绿化地球”的阶段？

　　The pond was full of mud and green slime.

　　池子里满是淤泥和绿色的污水。

　　The government has decided to give the green light to the plan.

　　政府已决定为这项计划开绿灯。