The traffic lights are the same in every country为什么用the same

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The traffic lights are the same in every country为什么用the same
The traffic lights are the same in every country为什么用the same

The traffic lights are the same in every country为什么用the same
就是指每个国家的交通信号灯都是红黄绿三个颜色,以及红灯停绿灯行.