Today we report about two scientists, J.Robert Oppenheimer and Enrico Fermi, who helped lead the world into the nuclear age.

VOA: special.2009.06.14

So, step five tells us to add 2 electrons between each atom, so we add two there.

那么，第五步告诉我们在两个原子之间放上两个电子，因此我们在这放上两个。

麻省理工公开课 - 化学原理课程节选

So here we have 3 minus l equals 0, because it's an s orbital, minus 1, so we have two radial nodes here.

这里我们有３减去ｌ等于０,因为这是ｓ轨道，减去１,我们有两个径向节点。

麻省理工公开课 - 化学原理课程节选

And in Central America we ship to Panama,Costa Rica, Honduras,Guatemala, and we are talking to two organizations in El Salvador."

VOA: special.2009.11.16

If we're going to write programs, we need at least two things: we need some representation for fundamental data.

如果我们要去写程序，我们需要至少两件事情：,我们需要一些能代表基础数据的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

Today we tell about two women who helped change the world of sports, golfer Betty Jameson and basketball coach Kay Yow.

VOA: special.2009.03.29

And we talk about two or three key things that might be really really important.

谈论两三件关键的事情,那些事情着实重要。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

This week on our program, we meet two Americans who put their imaginations to work in very different ways.

VOA: special.2011.01.31

OK, notice we have two inexact differentials and exact differentials. This is a condition.

好，注意到这里面有两个不准确微分量,和一个准确微分量，这是结论。

麻省理工公开课 - 热力学与动力学课程节选

We often say the two of them prove the proverb that the apple does not fall far from the tree.

VOA: special.2009.08.30

Then how's that theory if we takes the two halves brain ? into the two people who have both reserves?

那么如果我们把左右半脑,分别放进两个躯干里,情况又会怎么样呢？

耶鲁公开课 - 死亡课程节选

We will tell the story in two parts. Here is Kay Gallant with the first part of our story.

VOA: special.2009.05.23

We know that two vehicles are going to come along and not help Tony and that the third vehicle will, because everything, as I say, happens in threes in folklore.

我们知道有两辆车会过来,而且它不会帮助托尼，那么第三辆就一定会，因为，我说过，在民间传说中什么都只发生三次。

耶鲁公开课 - 文学理论导论课程节选

We also will tell about two studies of seabirds, and how a change of color could help fight rising temperatures.

VOA: special.2010.03.02

So now we have two candidates standing who are identical, politically, they're identical.

现在我们有了两个一致的候选人,在政治上,他们是一致的

耶鲁公开课 - 博弈论课程节选

Today we have the first of two programs about how the Lomax family helped keep American folk music from being lost.

VOA: special.2010.01.18

We say two of these trials will come for real, so if you buy the products, you pay us, we will ship the product to you, otherwise you keep the money.

我们告知受试者试验中有两种商品是真实的，所以如果受试者想要购买的话，就可以付钱给我们，我们把商品寄送过去，否则钱就是受试者的。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

This week we begin the first of two programs about classical music composers at work today in the United States.

VOA: special.2010.07.12

Covariance is--we'll call it--now we have two random variables, so cov... I'll just talk about it in a sample term.

协方差是...我们有两个随机变量,x和y的协方差是,从样本的角度来说

耶鲁公开课 - 金融市场课程节选

Today we present the second of two programs about contemporary classical music written by composers working in the United States.

VOA: special.2010.07.19

Each of these orbitals can have two electrons in them, so we get two electrons here, here, and here.

在每个轨道里面都有两个电子,所以我们有两个电子在这里，这里这里。

麻省理工公开课 - 化学原理课程节选

ROCKFORD: "So what?" ALLEN: "By the time we came out, we looked like the last two passengers on Noah's Ark."

VOA: special.2009.03.09

So in oxygen we have a similar situation where, in fact, we are not going to promote any of the electrons because we have two lone pair electrons no matter what we do.

在氧中，情况很类似，我们不能激发电子,因为无论如何我们都有两个孤对电子。

麻省理工公开课 - 化学原理课程节选

However,join us next week when we tell about two of the most dangerous gunfighters of the Old West.

VOA: special.2010.03.10

So, let's look at this in a more simple structure here where we have the two possible forms of benzene, and the reality is is that it's going to be some combination of the two.

让我们从一个更简单的结构,来看看这两种可能的苯环构型，实际情况,是这两个的组合。

麻省理工公开课 - 化学原理课程节选

"The most important thing from my perspective is making sure the American people understand we don't have two sets of rules here.

VOA: special.2009.02.06

But what we find is that we have two radial nodes. All right.

它有两个节点，好,我们可以转回到讲义上了。

麻省理工公开课 - 化学原理课程节选

He died in eighteen ninety-two. But if we can believe his poetry, death held no terrors for him.

VOA: special.2009.04.12

And again, we have the pairing of the unpaired electrons, and we have two orbitals coming together.

同样，我们有未配对电子的配对，我们有两个轨道结合。

麻省理工公开课 - 化学原理课程节选

So we know we always want to have our systems in as low an energy as possible, so it makes sense that a bond would happen any time we got a lower energy when we combine two atoms, versus when we keep them separate.

我们知道我们总是希望使我们的系统,处于能量尽可能低的状态，因此就应该有化学键产生,一旦我们合并两个原子之后体系的能量变得更低，相较于分开时。

麻省理工公开课 - 化学原理课程节选