OK. So to do this, we need a little more abstract way of talking about efficiency, and so, the question is, how do we think about efficiency? Typically there's two things we want to measure.

好，为了达到这个目的,我们需要用一种有点，抽象的方式去讨论效率，这衍生出来,一个问题，我们该怎么去认识效率？,主要来说我们有两个要量化的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

These are called concept sheets and they're one to two pages of things that you write about what's going on in the class.

你们需要写一份一到两页纸的观点报告,主要写一些与课堂内容有关的事情

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In terms of cost to institute this, the upfront cost to build classrooms, to accommodate this kind of structure, we need two classrooms that hold 170 students a piece to do this.

关于建这个项目的成本，最主要的就是搭建教室，使之适应这种教学模式，我们需要两间能装170人,的教室来上这种课。

麻省理工公开课 - 媒体、教育、市场课程节选

It doesn't work that way for a variety of reasons, but the main reason is that you want some decisions to be made at each space between two cells.

这出于很多原因,但主要的原因是,在每个细胞间隙,都需要决定信息是否继续传递

耶鲁公开课 - 生物医学工程探索课程节选

So what we think we know derives chiefly from archeological evidence, which is before writing--mute evidence that has to be interpreted and is very complicated, and is far from secure.

我们目前所认为的史实,主要都是从考古证据中所得,这些无声的证据出现于文字记录之前,因此就需要繁复的考证及解读,这些考证未必可靠

耶鲁公开课 - 古希腊历史简介课程节选

That's because, at the end, if- -suppose you're one month or two months away from the payoff of the mortgage, you don't have any balance left, so the interest that you're paying is -hardly any balance left--is very low and so you're payment is paying off principal, mostly.

这是因为,在最后,如果,假设你还剩1到2个月,就可以还清抵押贷款,那么剩下的贷款余额就很少了,因此你所需要付的利息,将会非常少,因为贷款余额几乎为零,此时你偿还的就主要是本金

耶鲁公开课 - 金融市场课程节选