how many traffic lights are there?现在就要

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howmanytrafficlightsarethere?现在就要howmanytrafficlightsarethere?现在就要howmanytrafficlightsarethere?现在就要这

how many traffic lights are there?现在就要
how many traffic lights are there?
现在就要

how many traffic lights are there?现在就要
这里有多少交通灯?

有多少交通信号灯呢?