他们将点火，制造石器工具，缝纫衣服，在身体上绘画等等各种群居生存需要的技巧按照捕猎者和收集者的区分传递下来。
They passed on lighting fires, making stone tools, wearing clothes, decorating their bodies and all sorts of skills to do with living together as hunters and gatherers.
石头不会腐烂，所以以前的(石器)工具能保存下来，虽然它们的制造者已经消失的无影无踪。
Stone does decay, and sotools of long ago have remained when even the bones of the man who madethem have disappeared without trace.
他补充说使我们作为一个种群能够生存进化成为可能的大部分原因是我们“控制和使用火，制造使用衣服的能力，新的打猎方式和新的石器工具的制造”。
He added that our success and progression as a species has been made possible, in large part, to our "controlled use of fire, the ability to use clothing, new hunting strategies and new stone tools."
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