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.
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