试图确定新几内亚的狩猎者和采集者面临着一个众所周知的难题：界定什么是狩猎者-采集者群体。
Attempts to identify New Guinean's hunter-gatherers face the well-known difficulty of defining what constitutes a hunter-gather group.
作为一个物种，自从出现以来，现代人类90%的时间是以狩猎者-采集者的方式生存。
Modern humans have lived as hunter-gatherers for more than 90 percent of their existence as a species.
这不仅是因为她们的日常饮食和饮食习惯发生变化，像研究人员以前相信的一样，而且还因为在农场安家的妇女比游牧的狩猎者-采集者更能生育。
That wasn't just because their diets and eating habits changed, as researchers previously believed, but because women who settled on farms were more fertile than nomadic hunter-gatherers.
如果现存的狩猎者-采集者还是像古代那样，那么这些关于他们社会模式的新数据对早期人类进化有重大意义。
If living hunter-gatherers are typical of ancient ones, the new data about their social pattern has considerable bearing on early human evolution.
古时，男性是狩猎者，女性是采集者。因此我们的大脑进化方式很有可能不同。
In ancient times, men were hunters and women were gatherers. Therefore, our brains probably evolved differently.
古时，男性是狩猎者，女性是采集者。因此我们的大脑进化方式很有可能不同。
In ancient times, men were hunters and women were gatherers. Therefore, our brains probably evolved differently.
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