1.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。
2.Simply watching a practised knapper at work shows just how many skills the maker of our handaxe 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。
3.Her flint-knapper today is Dennis Sandgathe, an archaeologist from Simon Fraser University in Canada.
她今天的燧石敲击者是加拿大西蒙弗雷泽大学的考古学家丹尼斯-桑德加特。