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雙腿直立行走的進(jìn)化是原始人向人類進(jìn)化的最初階段中的一步.We think about the evolution of bipedalism as one of first events that led hominids down the path to being human.我們沿著常有人行走的小道穿過(guò)森林.We followed a well - beaten path through the forest.你要是看到他在風(fēng)急浪...