They were sophisticated tool makers with high social and cognitive skills.
他们具有高度的社交及认知能力，制造工具非常有经验。
To test the theory, the scientists recreated what ancient tool makers might have done by heating a pile of silcrete stone in a fire pit.
为了检验这个理论，科学家们通过在一个火坑里加热砾岩石，重现了远古工匠们可能的做法。
Tool makers increasingly incorporate refactoring support into their products (and, indeed, Eclipse has a refactoring menu full of goodies), but it is still a process that requires manual steps.
工具厂商不断在其产品中结合对重构的支持(实际上Eclipse就有一个重构菜单，提供了很多支持工具)，但这仍然是一个需要手工操作的过程。
The evolution of the thumb allowed human beings to become tool-makers.
拇指的进化使人类成为工具制造者。
The evolution of the thumb allowed human beings to become tool-makers.
拇指的进化使人类成为工具制造者。
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