It took millions of years of evolution to produce the hands of a skilled flint-knapper like Sandgathe.
产生出一双桑德·加特那样熟练地敲击燧石的手，花了人类几百万年的进化工夫。
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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