As airport security is strengthened in Europe, a search of the last known London residence of the man who has been charged with trying to blow up a trans-Atlantic jetliner has been launched.

VOA: standard.2009.12.27

Behaviors last longer if they're reinforced intermittently " and this is known as "the partial reinforcement effect."

间隔强化会使行为持续时间更久,这就是所谓的“部分强化效应“

耶鲁公开课 - 心理学导论课程节选

And in the group of poems that were assigned for a section last week, you saw Milton alluding to just this passage, although you might not have known it, in Revelation 14 whenever he would speak of the music of the spheres.

上周规定阅读的那些诗歌中，你们看到弥尔顿暗指了这一段，虽然你们可能不知道，在《启示录》第14章，每次他讲到天体音乐时。

耶鲁公开课 - 弥尔顿课程节选

He became the first known American suicide bomber last October when he blew himself up in Somalia.

VOA: special.2009.10.17

Just last month,Mr.Blair was asked in a BBC interview what he would have done if he had known that Saddam did not hold any weapons of mass destruction in 2003.

VOA: standard.2010.01.02

Burma is also known as Myanmar. Last week,Secretary of State Hillary Clinton said the United States would pursue direct engagement with Burmese authorities, but that the U.S.would continue to employ sanctions.

VOA: standard.2009.09.29

Nepal's government has been in crisis since Maoist Prime Minister Pushpa Kamal Dahal - known as Prachanda - resigned last week after his call to oust the head of the Nepali Army was revoked by the president.

VOA: standard.2009.05.10

The $2.4 billion figure approved by the Global Fund to Fight AIDS, Malaria and Tuberculosis is $350 million less than last year's amount, which was set before the full effects of the world economic slump were known.

VOA: standard.2009.11.15

Gambari said that during the secretary-general's visit last month to Burma, which is also known as Myanmar, Mr.Ban met with the country's senior leadership and asked them to free Aung San Suu Kyi and other political prisoners as well as take steps to enhance the political process leading to next year's elections as a gesture of their credibility to the international community.

VOA: standard.2009.08.11