So it was a major change in human evolution where people started raising animals in large groups or started growing plants in large amounts.

这在人来演化史上是个巨大的变革,人类开始大规模饲养动物,或是大量种植农作物

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Then you see way back in human histories figures like this where people had to go hunt for their food, and of course there was danger involved in this.

让我们回到人类演化史上,如这张图所示,人们不得不去狩猎觅食,当然,这是非常危险的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选