她带着侄子——“我被允许同他一起生活。”她说——开始用一把锄头和一个铲子工作，打碎石头并建造了土墙。
With her nephew — "I'm allowed to live with him, " she said — she set to work with a pick and a shovel, cracking stones and fashioning mud walls.
从发现如何打碎石头制做工具切割肉类开始，人类即学着投机取巧。
Discovering how to chip stones to make a tool that would cut flesh was the moment man learned to be an opportunist.
她带着侄子(“我被允许同他一起生活，”她说。)用一把锄头和一个铲子开始工作，他们打碎石头并建造了泥胚墙。
With her nephew - "I'm allowed to live with him," she said - she set to work with a pick and a shovel, cracking stones and fashioning mud walls.
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