What was neat about it is before that time, the predominant species to use for air conditioning or refrigeration was ammonia.

在这之前是很整洁的，之前最主要的用于空调或者冰箱的,物质是氨。

麻省理工公开课 - 固态化学导论课程节选

This is a very good way to explain what you are doing at a given moment in time.

这个句型可以很好地解释在某一时刻你正在做些什么。

I'm ~ing 课堂 - SpeakingMax英语口语达人

That didn't work. Well they couldn't figure out what was wrong. And they spent a long time trying to debug the program.

调试这个程序,那时候当然不叫调试了,然后他们发现了问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

And what we saw last time is that this was necessary to make things work, this part of it in particular.

上节课我们讲,这是对外做功的必要条件，特别是这个部分。

麻省理工公开课 - 热力学与动力学课程节选

We don't know what it's like to be dead, because every time we try to imagine it, we fail.

我们不知道死亡是什么样的，因为每次我们想象死亡，都无果而终。

耶鲁公开课 - 死亡课程节选

What I did last time was to show you how to handle motion in more than one dimension.

上节课的内容,是用多维矢量描述运动

耶鲁公开课 - 基础物理课程节选

So realize you don't have to get it right the first time, but you have to listen and watch to what actually those problems are and that is one of the roles your teaching fellows play.

请认识到，并不是要你第一次就把事情搞对，但是你必须听听，看看,问题是到底什么，这也是你们的助教,扮演的一个角色。

哈佛公开课 - 计算机科学课程节选

I think this sums up nicely what I was trying to communicate last time.

它正切合了我,上次的纲领大意。

耶鲁公开课 - 1945年后的美国小说课程节选

Now, you don't have to buy that and individuals undoubtedly found the strain too much from time to time, but what's interesting, is rather the ideal, the claim, the theory.

你不必非得接受这些理论,况且现代社会常充斥着个人主义倾向,但是那些理想,主张和理论却更意味深长

耶鲁公开课 - 古希腊历史简介课程节选

In our case, we encourage our employees to spend 20% of their time working in whatever they're interested in, not what their boss wants them to work on.

就谷歌而言我们鼓励员工,将20%的时间花在,任何自己感兴趣的问题上，而不是完全地按照上级的要求工作。

普林斯顿公开课 - 领导能力简介课程节选

What it means is I don't want to take unique time that we could be discussing other things in class by covering things that you could have read already.

这只说明我不想在课上单独花时间,来讲你们可能已经看过的东西,这个时间可以用来讨论其他内容

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

To answer the question what is Biomedical Engineering, we're going to spend time on that today and we'll spend time on Thursday, and I want to approach it from a couple of different angles.

我在今天和周四课上,来回答,生物医学工程是什么,我会从一系列不同的角度来带你们入门

耶鲁公开课 - 生物医学工程探索课程节选

So you should remember that any time we combine 2 s orbitals, what we're going to find is if we constructively interfere those two orbitals, we're going to form a bonding orbital.

你们要记住，任何时候我们组合两个2s轨道，我们会发现,如果我们把它们相长叠加，我们会得到一个成键轨道。

麻省理工公开课 - 化学原理课程节选

for example, in the exams I take time to like figure out what words I want to use

比如说，考试的时候我要费时间想我要用哪个词，

来自西班牙的留学生 - SpeakingMax英语口语达人

So what I'm saying now is it took a long time for this to solidify. And one of the things we think made it solidify was the development of codices,a codex.

所以这花了很长一段时间,才得以统一，我们觉得,使它统一的是抄本的出现。

耶鲁公开课 - 新约课程节选

spent a lot of time and effort kind of figuring out what is it that people will want to buy next week.

他花费了很多的时间和精力来研究,人们想要在下个星期买进什么。

耶鲁公开课 - 金融市场课程节选