There are a number of different methods that scientists use to see what foods are related to particular health outcomes, and we won't go through all of them but I will -over the course of the class we'll talk about various methods, but I'd like to talk about two primary ones today.

科学家有很多不同的方法,来研究食物与健康的关系,我们不会一一提及但我会,这门课上我们会提到很多方法,但我今天只想说两大重要方法

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选