当资源枯竭时，狩猎采集者总是可以选择迁移到其他地方，但这对于农业来说则更加困难。
While hunter-gatherers always had the option of moving elsewhere when the resources were exhausted, this became more difficult with farming.
在亚马逊流域，有无数的狩猎采集者，他们生活在世界上最大的沿河生长的树木的枝干上。
There are numberless hunter-gatherers in Amazonia, living along branches of the world's largest river tree.
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.
应用推荐