Even the earliest of tribes had a systemofnumeration that, if not advanced, was sufficient for the tasks that they had to perform.
即使是最早的部落也有一种计算系统,哪怕不先进,也足以完成他们必须执行的任务。
2
From earliest childhood, we are so bound up with our systemofnumeration that it is a feat of imagination to consider the problems faced by early humans, who had not yet developed this facility.