Okay, so the body has a way of metabolizing and making use of the food such that you can get energy or nutrients from it.

对的,身体可以代谢并利用食品,从中获取能量和营养

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Here is a picture of a cover from the journal--the magazine The Economist who were writing about food and nutrition in modern times and they created this graphic for the website to show the evolution of humans.

这是来自《经济学人》杂志的一篇关于,现代食品和营养的报道,他们为网站制作了这张图,来演示人类的演化过程

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选