If you go to the dining hall you know, the portions-- one person serves themselves this much of a food and another serves themselves another, and then when you go to a restaurant there are variations on how much you get served of things, and so it's very hard to estimate portions for people.

如果你去食堂,摄入量是指,一个人吃了自己的那部分食物,或其他人吃的他们的那一部分,当你去餐厅,每次吃多少是变化的,因此估算每个人的摄入量是很难的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

We're going to see variations of this, we're going to see a variation of it called recursion, a little later on, but for now we're just going to talk about how do we do iterations.

我们稍后会去，看它的变量,它的所谓的递归数的变量，但是现在我得先讲讲,怎么来实现迭代。

麻省理工公开课 - 计算机科学及编程导论课程节选

The Republic is a book about the regime and all later political philosophy is a series of footnotes to Plato and that means that it must provide a series of variations so to speak on Plato's conception of the best regime.

理想国》是一本关于政体的书,之后所有的政治哲学都不过是一系列,对柏拉图的批注，也就是说，它必需提供,一系列的差异来解释,柏拉图概念中的最佳政体。

耶鲁公开课 - 政治哲学导论课程节选