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

If you eat food for a long time and then you stop, let's say a high sugar diet or something and withdrawal symptoms occur, well that might mean addiction is occurring.

如果你长期吃某种食物,一旦停止食用,例如高糖饮食之类,就会出现戒断反应,这也许说明你已经上瘾了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选