Well, the only way you know is to do studies-- and we'll talk about how these are done in the next class-- linking dietary behavior, food intake with health.

了解这些的唯一方法是做研究,而在下一节课,我们会谈论具体过程,联系饮食习惯,食物摄入与健康

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选