But as analysts Charles Kupchan of the Council on Foreign Relations points out, security and political considerations rule out such an option in Pakistan.

VOA: standard.2009.09.09

And, you've undoubtedly heard a lot in the public press, and even in the political dialogue such as it is these days that hydrogen might be on environmentally friendly fuel.

毫无疑问你已经在公开新闻上，甚至在政治的对话上听到过了,比如最近这些天,氢气是一种环境友好的燃料。

麻省理工公开课 - 固态化学导论课程节选

John Brennan says "he has heard enough" "Quite frankly, I am tiring of politicians using national security issues, such as terrorism, as a political football."

VOA: standard.2010.02.07

There was generally favorable response across the political spectrum in Muslim countries to the president's public statements - such as a pledge made before Turkey's Parliament in Ankara.

VOA: standard.2009.04.24

Arab League Secretary General Amr Moussa told the 57 Islamic Conference states, as well as dozens of other countries and aid agencies, that such political efforts must be joined by developmental strategies.

VOA: standard.2010.03.21

U.S.officials are concerned such a prolonged political process will create an opening for al-Qaida to try to foment ethnic strife, just as tens of thousands of U.S.troops are scheduled to be leaving Iraq.

VOA: standard.2009.12.12

Shops are open; people are at work. But many Poles are also asking questions such as why so many of the country's political leaders were traveling on one plane and why, if as Russian authorities say, the pilot ignored warnings against trying to land in poor weather conditions.

VOA: standard.2010.04.12