The macro nutrients are the big constituents of food, that's protein, carbohydrate, and fat.

大量营养素是食物重要组成来源,即蛋白质,碳水化合物和脂肪

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

On the left, you see somebody expending enormous physical effort to secure the food.

在左边,你能看到人们耗费大量体力,以保证食物供给

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

We take in a lot of food and water everyday, every year, and yet most of us our weight stays remarkably stable over that period of time for adults despite how much we eat and how much we drink.

日复一日年复一年,我们都摄入大量的食物和水,但我们绝大部分人的体重,在成年期都保持得很稳定,不管我们怎样大吃大喝

耶鲁公开课 - 生物医学工程探索课程节选

I just mentioned examples of that, so the organism seeks out fat, sweet, and variety and eating large amounts of food becomes a priority, at least according to the brain.

我仅仅是举了个例子,机体寻求脂肪,糖或其他食物,大量进食成了首要任务,至少大脑是这么认为的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选