Sometimes, sciencecan seem overwhelming. There are complicated concepts, unimaginably large - or small - objects, and vast distances that most people have a hard time understanding.

VOA: standard.2010.05.04

So a bit of uninteresting math, a bit of focus on sizes of types, but any questions on syntax or concepts thus far before we now put this to the test?

一些比较无趣的数字，一些关于类型的大小,在我们现在进行试验之前,你们对这其中的语法或概念有什么问题吗？

哈佛公开课 - 计算机科学课程节选

Another important concept in probability theory that we will use a lot is expected value, the mean, or average-- those are all roughly interchangeable concepts.

概率论中另外一个常用的重要的概念是,期望值或者也叫均值,这两个概念可以互换

耶鲁公开课 - 金融市场课程节选

I don't expect you to learn that, or even retain it unless I explain the concepts in class, or unless they're explained quite well in the paper itself.

我不要求你们掌握这个,更别提记忆了,除非我在课上做了讲解,或者它们在文章中解释的非常透彻了

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 start talking about vaccines which is really sort of applied immunology: trying to take immunological concepts and put them into action or to engineer them in some way.

我们将会从,属于应用免疫学范畴的疫苗问题讲起,以便把免疫学上的概念,同实际应用或者某种工程学应用联系起来

耶鲁公开课 - 生物医学工程探索课程节选

I want to talk about the stock market today and I thought I would keep it more or less basic because I think-- I want to emphasize basic concepts.

今天我想讲一些股票市场的内容,我想多讲些基础的内容,因为我认为基本概念很重要

耶鲁公开课 - 金融市场课程节选