"We can't affirm that exposure to pesticides is causing A.D.H.D.

VOA: special.2010.05.26

- There are a few equations that you need to memorize -- those are the very simple -- very, very simple equations, such as e equals h times nu -- hopefully you don't have to sit down and try to memorize that, hopefully we all know that already.

只有几个公式是需要记住的-,它们都非常简单，非常非常简单，比如，E，等于，h，乘以，ν,希望大家不需要再专门去背了，希望我们已经都记住了。

麻省理工公开课 - 化学原理课程节选

E. E. Cummings, T. S. Eliot, W. H. Auden

. E. 康明斯、T. S. 艾略特、W. H. 奥登，

我的专业 - SpeakingMax英语口语达人

It can be spelled y-o-g-u-r-t or y-o-g-h-u-r-t.

VOA: special.2009.01.19

So if you had a high temperature, this a small compared to b. If you're negative which means that dT/dp at constant H is less than zero.

高于反转温度，这一项相比于b很小,意味着H恒定时,偏T偏p小于零。

麻省理工公开课 - 热力学与动力学课程节选

So, why don't you go ahead and tell me, keeping that in mind, which atom in terms of h c or n would you expect to be in the center of hydrogen cyanide?

那么，请大家来告诉我，并且记住它，你认为氢，碳和氮中哪个原子,应该在氰化氢的中间呢？

麻省理工公开课 - 化学原理课程节选

Why didn't they keep right on going with G, H, I, J, K, L, M, N, O, P?

为什么他们不接着写下去呢,按照字母表

耶鲁公开课 - 聆听音乐课程节选

For example, if t* is the time you hit the ground, then t* satisfies the equation h - 1/2 g ^2 = 0.

例如,如果在 t* 时刻落地,那 t* 就满足等式 h - 1/2 g ? ^2 = 0

耶鲁公开课 - 基础物理课程节选

H- *H + e-> H-* And, clearly, we can't do both.

到一个电子生成*,但我们发现我们不能同时做到两个。

麻省理工公开课 - 固态化学导论课程节选

dT That means that dH is also equal to dH/dT, constant pressure dT. All right, so now I've T ot more dH/dT under constant pressure.

也等于偏H偏T恒压乘以，现在我已经得到了在恒压,状态下的偏H偏。

麻省理工公开课 - 热力学与动力学课程节选

So here are results for pathway A, right, for delta u zero delta H zero. I didn't actually explicitly write it or did I?

这是路径A的结果，△U是零,△H是零，我没有明确地写出来,是吧？让我们把它再写一遍？

麻省理工公开课 - 热力学与动力学课程节选

T Remember, we're trying to get delta H, p we're trying to get dH/dT constant pressure and dH/dp constant temperature. OK, these are the two things were trying to get here.

想要得到在恒压状态下的偏H偏，和在恒温状态下的偏H偏,好的，这是两个我们，在这里想要得到的东西。

麻省理工公开课 - 热力学与动力学课程节选

du But here you've got pressure constant. du, T this is du, not H here. du/dT is only equal Cv to Cv when the volume is constant, not when the pressure is constant.

这里是压强横笛，du，这是，不是H，偏U偏,只在体积恒定时等于，而不是压强恒定时。

麻省理工公开课 - 热力学与动力学课程节选

So what actually turns out the reality is that h e 2 does exist, but it exists as the weakest chemical bond known, and it wasn't, in fact, even found to exist until 1993, so I can assure you this is not a bond that you see very often in nature, and it is a very, very weak bond.

实际上He2键是存在的，但它是目前所知的最弱的键，直到1993年它才被发现，所以我可以向你们保证在,自然界你们不可能经常看到它，它是种非常非常弱得键。

麻省理工公开课 - 化学原理课程节选

What is dH/dT as a function, keeping pressure constant, what is dH/dp, keeping temperature constant?

恒定时偏H偏T是什么,温度恒定时的偏H偏p又是什么呢？,好的，让我们解决第一个问题？

麻省理工公开课 - 热力学与动力学课程节选

We already did that. OK, dH/dT constant pressure is Cp. That was easy one.

我们已经做过这个计算了，好的，在恒压,状态下的偏H偏T就是Cp，这个很简单。

麻省理工公开课 - 热力学与动力学课程节选

Adiabatic q equal to zero. It's also delta H 0 which is zero. The two didn't necessarily follow because remember, delta H is dq so p is only true for a reversible constant pressure process.

在这个过程中ΔH等于,绝热的所以q等于0，而ΔH也等于,这两个也不一定有因果关系,因为，记住，ΔH等于dq只有在恒压。

麻省理工公开课 - 热力学与动力学课程节选