论文部分内容阅读
有一则近于黑色幽默的小故事:美国铁路两条铁轨之间的标准距离是4．85英尺。这是一个很奇怪的标准,究竟从何而来的?
There is a short story near black humor: The standard distance between the two railroad tracks on the U.S. Railways is 4.85 feet. This is a very strange standard, what exactly came from?