而来源则是根据前人研究的结果，确定了七个具有代表性的来源。
And the source made sure seven representative sources according to the result that the people had been studied.
前人的研究表明男性在导航时倾向于根据所处的区域形成心象地图，并在地图中定位。
Previous work has shown that men tend to navigate by creating mental maps of a territory and then imagining their position on the maps.
根据对史前人类骨骼上可能是人类牙齿痕迹的新研究表明，史前人类，和穴居人和能人一样，都会相互残杀作为食物。
Prehistoric humans, along with Neanderthals and Homo antecessor, made meals of each other, suggests new research on probable human teeth marks found on prehistoric human bones.
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