It lists the protein but not the percent daily value, so you noted something interesting about the food label.

这里列出了蛋白质却没写其日摄取百分比,你注意到了食品标签里一个有趣的现象

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If you think about the modern food environment compared to the ancient one, so let's say somebody getting something at a fair compared to the old days.

如果将现在的饮食环境,与过去的相比,例如比较在现在和过去的人们,在集市上能买到哪些东西

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

One might have to do with where it's from and how it's made so that might tell us a little bit about whether something should be defined as a food.

一个是关于食品源自何处,怎么生产的,这会给我们一些参考,去判断何为食品

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选