For example, if one bracket a second was filled out, it would take 292 trillion years to fill out all possible brackets,".

VOA: standard.2009.03.25

Let me take a second to ask.

我再问一遍

耶鲁公开课 - 基础物理课程节选

So, second ionization energy simply means you've already taken one electron out, now how much energy does it take for you to take a second electron out.

第二电离能简单地说就是,在你已经拿走一个电子以后，再拿走第二个电子,所需要消耗的能量。

麻省理工公开课 - 化学原理课程节选

What's a function, what's a derivative, what's a second derivative, how to take derivatives of elementary functions, how to do elementary integrals.

什么是函数,什么是导数,什么是二阶导数,如何对初等函数求导,如何进行初等积分

耶鲁公开课 - 基础物理课程节选

Let me take this back to the board a second.

让我把这张表写上黑板

耶鲁公开课 - 博弈论课程节选

You've learnt what the words mean, but you have abstract and unconscious rules that take these words, figure out the order, and in a fraction of a second, give rise to understanding.

虽然你已经知道了这些单词的意思,但却是你所拥有的抽象且无意识的规则,让你认清单词,确认语序,然后在一瞬间让你理解整个句子

耶鲁公开课 - 心理学导论课程节选

So, using those, now, what happens if we take the second derivative of A, the mixed derivative, partial with respect to T and the partial with respect to V.

如果我取A的二阶导数,混合导数，对T偏微分,再对V偏微分。

麻省理工公开课 - 热力学与动力学课程节选

But this happens to be completely legitimate, so I'm going to assume it's true and I'll maybe take a second explaination why it's legitimate.

但这里所说的情况是完全合理的,所以我先假设这是对的,待会儿再进一步解释为什么合理

耶鲁公开课 - 基础物理课程节选

If I take the second derivative I get 2, but I want to get a and not 2.

如果我再求二阶导数就能得到2,但我想要a不想得到2

耶鲁公开课 - 基础物理课程节选

Let's take a system. Under constant pressure T1 V1, going to a second -- this is the system, so let me write the system here.

我们建立一个系统1,在恒定的压强T1，V1，下，变成了另一个系统，-这个初始的系统让我把它写在这。

麻省理工公开课 - 热力学与动力学课程节选