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我们祖先的语言能力可能是从手势进化发展过来的,而不是发声条件变化而来的。手势与语言在我们的大脑中有某种密不可分的联系。
The linguistic competence of our ancestors may have evolved from the evolution of gestures, not from changes in vocal conditions. Gestures and languages have some sort of inextricable link in our brains.