There can scarcely be any doubt that in each country the unit of length has been derived from the length of the human foot. But,as might have been expected from such an origin,no two people have agreed in the length of their standard.

• 毫无疑问，每一个国家的长度单位来自人足的长度。但是因为来源如此，没有两个民族的标准长度是一致的，这是可想而知的。