Nutrients get broken down into several classes and these are the constituents of food that your body uses for one purpose or another.

营养素这个问题需要花几节课来讨论,它们是食物的组成要素,供给身体吸收,支持身体机能运转

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You're not going to need to know a lot about this for this course, but this is--I wanted to get the basic ideas down.

对于本门课程来说,你不必,对刚才讲的概率的知识有很深入的了解,我只想介绍一些概率论的基本概念

耶鲁公开课 - 金融市场课程节选

He does go around and around the same idea a number of times, which does cut down on the notes for the class, " but it can get a little boring."

他的确一遍遍重复同样的观点很多次，从而减少了课程的笔记内容，但是会让人感到有点无聊“

耶鲁公开课 - 死亡课程节选