"The point of a counter-insurgency policy is for the U.S.forces and the NATO forces to be able to help protect the Afghan population,".

VOA: standard.2009.10.25

So U.S. will never be able to catch up.

所以美国就别想赶上中国了。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

Just like u, we'd like to be able to express it in a way that allows us to calculate what happens only from equation of state data.

就像内能u一样，我们希望能够利用状态方程的数据,计算出其表达式,这些表达式能方便我们说出即将发生的过程。

麻省理工公开课 - 热力学与动力学课程节选

Mr.Obama admits that coordinating the activities of 16 U.S.spy agencies is a major challenge, but he believes Clapper will be able to do so.

VOA: standard.2010.06.05

Earlier,White House Press Secretary Robert Gibbs said U.S.commanders in Iraq are confident that Iraqi security forces will be able to take control of the nation's cities.

VOA: standard.2009.06.30

Former U.S.President Jimmy Carter says Kennedy was able to put his policies into action.

VOA: standard.2009.08.26

I'll never be able to hug them," The top U.S.military officer, Admiral Michael Mullen, says intelligence officers are studying the video, but he declined to share their conclusions during a news conference.

VOA: standard.2009.07.20

House of Representatives Democratic majority leader Steny Hoyer told reporters Wednesday he is not yet at the point of being able to support a potential decision to send more U.S.troops to Afghanistan.

VOA: standard.2009.10.15

"I think this will reverberate very loudly in the region, and you will see it perceived especially by our enemies, by the Taliban and al-Qaida, as an admission that America is losing its will and is not committed over the long term, and they will be able to convince their recruits to wait the U.S.out,"

VOA: standard.2009.12.06