After meeting with the Canadian leader in the Oval Office, Mr.Obama said he is continuing to discuss the issue with U.S.allies.

VOA: standard.2009.09.16

And typically, we'll be treating at least some cases where we're dealing with ideal gases in which case we can easily get delta u.

那么我们也可以定出功，对吧？,典型地，我们至少会处理,一些理想气体的情况。

麻省理工公开课 - 热力学与动力学课程节选

Now, you know with constant volume, H now it's not going to be delta H that's U straightforward to measure, it's going to be dealt u, all right.

好，现在你们知道在体积恒定的条件下，我们得到的不是Δ,我们直接测量到的是Δ,好，但这基本上也是一样的。

麻省理工公开课 - 热力学与动力学课程节选

With U.S.casualties in Afghanistan on the increase, the president is considering requests from his military commanders for more troops.

VOA: standard.2009.11.16

This sense, this glamour thinking, along with price increases, caused Los Angeles to boom; so it's the boomiest U.S. City.

某种意义上,群星荟萃加上房价上涨,推动了洛杉矶房地产的繁荣,所以它成为了全美房产最繁荣的地方

耶鲁公开课 - 金融市场课程节选

In keeping with U.N.tradition, the U.S.president will address the General Assembly on the first day of its annual debate, on September 23.

VOA: standard.2009.09.02

This curve here with the square shows you how many millions of vaccine doses were distributed across the U.S.

这个带方形的曲线图显示了,在美国数以百万计的,疫苗是如何使用的

耶鲁公开课 - 生物医学工程探索课程节选

Homeland Security Secretary Janet Napolitano, a key figure behind this week's aid package, will visit Mexico early next month along with U.S.

VOA: standard.2009.03.25

I don't know if any of you watched tennis recently, but the U.S. Open has been shown and there's an Oreo advertisement with the William sisters and so you--that's why people know about these foods.

不知道你们最近看没看网球赛,美国网球公开赛上有一则奥利奥广告,是由威廉姆斯姐妹做代言的,人们以这种方式听说这类食品

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The Obama administration says the United States will follow interrogation guidelines set forth in the U.S.Army Field Manual,which conform with U.S.and international law.

VOA: standard.2009.08.24

They've become forces of nature in the U.S. Economy, in the sense that people accept these letter grades with great authority.

他们和美国经济密不可分,在这种情况下,人们笃信机构的字母评级

耶鲁公开课 - 金融市场课程节选

Mr.Obama promised a new era of cooperation with U.S.allies abroad during last year's presidential election campaign.

VOA: standard.2009.04.03

I managed to find price indexes for Norway and Netherlands going back to 1890 and compared that with the U.S.

我找到了挪威和荷兰1890年的,价格指数数据,和当时的美国作比较

耶鲁公开课 - 金融市场课程节选

Mr.Medvedev discussed the Iranian nuclear program there in a separate meeting Sunday with U.S.President Barack Obama.

VOA: standard.2009.11.16

So, I just want to write a few examples down with a few values for delta u or delta H or delta S, and see whether we can get any clues from what we see.

我先写一些例子,例子包含一些内能，自由焓和熵的变化数值，然后看从中,我们能不能得到一些启示。

麻省理工公开课 - 热力学与动力学课程节选

Mr.Barroso and Mr.Reinfeldt will be discussing climate change next week with U.S.President Barack Obama in Washington.

VOA: standard.2009.10.30

The SEC was very controversial at first because it was seen as interfering with business and the U.S. Has been built on principles of individual freedom; this seemed like unnecessary government intrusion.

起初,证券交易委员会引起了许多争议,因为人们认为它会干扰商业运作,个人自由是美国的立国之本,政府的干预似乎并非必要

耶鲁公开课 - 金融市场课程节选

These are some of the experiences Musabih shared with U.S.law enforcement and social agencies gathered at the University of Dayton,Ohio for the Human Trafficking Accords.

VOA: standard.2009.11.13

We call an instrument of the U.S. Treasury with a maturity less than or equal to one year--we call that a bill and they used to be the only discount bonds issued by the U.S. Government.

我们把期限小于或等于一年的,国库券品种称为短期国库券,它们曾是美国政府,唯一发行的贴现债券

耶鲁公开课 - 金融市场课程节选

He says he even made a deal with U.S.diplomat Richard Holbrooke after the war which granted him immunity from prosecution if he left public life.

VOA: standard.2009.10.26

Now remember that only appears in DNA and appears in RNA, and so can also form a hydrogen binding pair with .

还要记住T只出现在DNA中,而U出现在RNA中,U和A也可以通过氢键结合就可以了

耶鲁公开课 - 生物医学工程探索课程节选

President Obama spoke at the end of a meeting with U.S.central bank head Ben Bernanke, Treasury Secretary Timothy Geithner, and other members of his economic team.

VOA: standard.2009.03.23

How happy I am with x dollars is called U.

我对于x美元的满意程度设为U

耶鲁公开课 - 金融市场课程节选

Clinton met with U.S.Embassy leaders, as well as the top military commander for U.S.

VOA: standard.2009.11.18

OK, so for a constant volume process, du we can write du, partial derivative of dT u with respect to T at constant V, dT, dv plus partial derivative of u at constant V, dV.

好，对于一个恒定体积的过程，我们可以写出,等于偏u偏T，V不变，加上偏u偏V，T不变。

麻省理工公开课 - 热力学与动力学课程节选

On May 7,Keith will kick off his "Escape Together World Tour" with U.S.

VOA: standard.2009.04.19

But the Afghans often have their own way of doing things. And that sometimes conflicts with U.S.-led efforts to forge a larger, more independent Afghan security force.

VOA: standard.2009.12.13

She credited the government in Luanda for moving to reduce corruption in the oil sector by publishing revenues on line and working with U.S.officials to increase transparency.

VOA: standard.2009.08.10

(NO TRANSCRIPTS) Anti-war organizers said turnout was much lower than at similar marches before Mr.Obama became president, but they said disenchantment with U.S.foreign policy was growing again.

VOA: standard.2010.03.20

In addition to Senator Kerry, Foreign Minister Qureshi met with U.S.

VOA: standard.2009.10.13