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开绿灯 give the green light

language.chinadaily.com.cn| Updated: 2019-03-18
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众所周知,交通信号灯(traffic lights/ traffic signals)有“红灯停,绿灯行(The green light allows traffic to proceed. The red signal prohibits any traffic from proceeding.)”之说。

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[SIPA]

开绿灯”指交通路口打开准许行人车辆通过的信号(give the go-ahead signal,give the green light),后多用于比喻“允许某事(allow someone to do something or something to happen)”,或“提供方便条件(make easier for)”。

例句:

官僚主义总是为腐败大开绿灯。
Bureaucracy always gives the green light to corruption.

我们永远不会给赌博开绿灯。
We'll never give the green light to gambling.