单词:irregular nebulae
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ANNOUNCER: EXPLORATIONS -- a program in Special English by the Voice of America. (MUSIC) Today, Richard Rael and Tony Riggs tell the story of American astronomer Edwin Hubble. He changed our ideas about the universe and how it developed. Edwin Hubbl
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The U.S. Defense Department has taken several steps in recent weeks to ensure that hard won lessons in counterinsurgency are not lost when the wars in Iraq and Afghanistan are over. The military has been ordered to establish organizations to preserv
By Lisa Schlein Geneva 11 August 2007 The government of Niger and the International Organization for Migration have launched an information campaign aimed at raising awareness of the dangers of irregular migration in order to better prevent it. The c
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