But for most of human history, there was only one thing that you really needed in order to travel - a stone hand axe.
但是在人类历史上的多数阶段，你旅行中真正需要的可能仅仅是一把石制手斧。
Simply watching a practised knapper at work shows just how many skills the maker of our hand axe must have possessed.
仅仅观看一个熟手石器专家工作，就想而知我们这把石斧的制造者得拥有多高的技艺了。
Simply watching a practised knapper at work shows just how many skills the maker of our hand axe must have possessed.
仅仅观看一个熟手石器专家工作，就想而知我们这把石斧的制造者得拥有多高的技艺了。
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