单词:allylic migration
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These 60 paintings tell about the movement of African-Americans in the first half of the 20th century. Transcript of radio broadcast: 06 July 2008 VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Barb
By Lisa Schlein Geneva 27 June 2007 The United Nations warns that a doubling of urban populations in Africa and Asia by 2030 will have harmful consequences if governments do not prepare now for the coming growth. In this year's State of World Populat
By Scott Bobb Johannesburg 08 November 2007 The European Union has announced a plan to admit 20-million skilled workers during the next 20 years in order to meet projected labor shortages. The proposal has drawn protests from leaders in developing na
By Lisa Schlein Geneva 13 April 2008 A new report indicates Iraqi refugees and internally displaced people who have returned home find no relief from the humanitarian crisis they suffered during their exile and displacement. Iraq's Ministry for Displ
By Greg Flakus Merida, Mexico 13 March 2007 President Bush is visiting a hacienda (plantation) in the Mexican state of Yucatan with his host, President Felipe Calderon, where the two leaders are discussing immigration, the fight against drug smuggle