U.S.officials have warned North Korea against going ahead with what it says will be the launch of an experimental space satellite early next month.

VOA: standard.2009.03.25

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

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

I do not stand with them," The U.S.government will be an investor in a restructured Chrysler and will help choose its new board of directors.

VOA: standard.2009.04.30

"Standard Missile-3" interceptors will be placed on Polish soil, along with other interceptor missiles deployed on U.S.Navy ships in the Mediterranean and the North Sea.

VOA: standard.2009.10.22

Everyone wants to export to the United States and that creates a huge incentive for producers and exporters to be in compliance with the U.S.Lacey Act.

VOA: standard.2010.05.28

Their first order of business will be deciding on an alliance with a U.S.airline.

VOA: standard.2010.02.01

U.S.coach Mark Johnson said that fans need to be patient with teams that are trying to develop in a sport where they do not have a strong tradition.

VOA: standard.2010.02.15

In all,General Allyn says within the next few days there will be about 5,000 U.S.troops on the ground in Haiti, with another 5,000 on the ships supporting the effort.

VOA: standard.2010.01.19

Pacific island territory of Guam. The move,aimed at reducing noise and other complaints of the so-called U.S."footprint" on Okinawa will be underwritten with nearly $3 billion provided from Japan.

VOA: standard.2009.08.31

And he adds that it would be useful for U.S.law enforcement officials to coordinate with foreign agencies and governments, since cigarette smuggling has increasingly become a crime with no borders.

VOA: standard.2010.08.11

"Peter is in good health despite many months of captivity, he's undergoing full medical checks and he is going to be reunited with his family as soon as possible back in the U.K.,".

VOA: standard.2009.12.30

Meanwhile,IntelCenter,a U.S.-based terrorism monitoring group that works with the U.S.government, warns the Christmas day attack could be just the start, and that the possibility of additional attempts on U.S.airplanes can not be ruled out.

VOA: standard.2009.12.26

And with a total U.S.audience estimated to be around 150 million viewers, Thomas Harpointner, CEO of the e-business and interactive consulting company AIS Media, says many advertisers don't want to miss it either.

VOA: standard.2010.01.27

But,I think in general it will be very,very well received," The U.S.is placing great importance on improving relations with Egypt and with veteran Egyptian President Hosni Mubarak, after tensions during the Bush Administration.

VOA: standard.2009.05.09

With the impasse unlikely to be resolved before the end of this month, when U.S.troops will drop to their lowest levels in Iraq since the war began in 2003, the U.N.Security Council pressed the legislators to work through their differences in "the national interest" and form "as quickly as possible, a government that is inclusive and represents the will of the Iraqi people."

VOA: standard.2010.08.04