The vigesimal system (countingin base 20) is thought to originate from humans' fingers and toes.
据猜想,二十进制(以20为基数进行计算)源于人类的手指和脚趾。
2
There is probably some double-countingin the two sets of figures, because many peat bogs are found in forests, and are thus drained as those forests are cleared.