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美国两条铁轨之间的标准距离约为1.22米,这个有零有整的奇怪标准,就是英国铁路的标准。英国的铁路最初是由造有轨电车的人设计的,有轨电车也是
The standard distance between two railroad tracks in the United States is about 1.22 meters. This weird standard of zero is the standard of the British Railways. British railroads were originally designed by tram-builders, as are tramways