单词：allylic migration
单词：allylic migration 相关文章
Britain Faces Migration Dilemma as it Looks to Commonwealth for Post-Brexit Trade LONDON Britain has indicated that is will seek a so-called hard exit from the European Union, likely to include leaving the Single Market, the worlds largest free trade
VOA标准英语2017年(一月)
DEVELOPMENT REPORT - International Migration Reduces Poverty, but at a Price By Jill Moss Broadcast: Monday, October 31, 2005 I'm Steve Emberwith the VOA Special English Development Report. A new Worl
农业与发展
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. People get malaria from Anopheles mosquitoes that themselves are infected with a protozoan parasite called Plasmodium. The mosquitoes do have immune sy
Scientific American(三)月
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
VOA慢速英语2008年（七）月
This is the VOA Special English Agriculture Report. About eight hundred million people in Africa, Asia and South America eat cassava. The plant is a major source of food energy and a major food security crop. It can survive in poor soil and without m
2010年VOA慢速英语(六)月
By Nico Colombant Dakar 01 December 2006 Victims of African migration are not only young people who go on reckless trips trying to get to Europe. They also include those affected by economic migration within the continent. Among these are wives left
2006年VOA标准英语（十二月）
By Nico Colombant Dakar 27 November 2006 Even as officials recently discussed ideas to prevent growing illegal migration from Africa to the shores of Europe, African mothers who lost their sons at sea were busy trying to help their communities. Many
2006年VOA标准英语（十一月)
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
2007年VOA标准英语（六月）
By Melinda Smith Washington, D.C. 21 March 2007 watch Tuberculosis US report Beginning around 1995, the United States experienced a steady decline in the rate of tuberculosis. But in the last three years, health experts have noticed something distur
2007年VOA标准英语（三月）
Third Great Migration Might be in Progress In the early 20th Century, more than two million African-Americans left their homes and small farms in the South and moved to northern industrial cities to escape overt racism and search for better work and
VOA标准英语2011年(七月)
India Seeks to Counter Possible Backlash onMigration of High-Tech Jobs Anjana Pasricha India is asking Asian countries to resist a potential backlash in developed nations as Western companies move tec
VOA2004（上）--各类新闻
By Jessica Berman Washington 06 February 2008 Researchers say measles, which has been successfully controlled in most countries thanks to vaccination, remains a killer disease in Niger, in part because of migration triggered by the rainy season. VOA'
VOA常速英语2008年（二月）
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
VOA常速英语2007年（十一月）
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
VOA常速英语2008年（四月）
By Margaret Besheer Washington 05 November 2007 Criminals around the world are using the Internet to steal money from people in developing countries who dream about migrating to the United States and other Western countries. Posing as penpals or love
VOA常速英语2007年（十一月）
By Nancy Palus Dakar 20 March 2008 The effects of climate change are increasingly driving people in sub-Saharan Africa to migrate in search of better living conditions, according to experts who gathered this week in the Senegalese capital, Dakar. Nan
VOA标准英语2008年（三月）
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
2007年VOA标准英语（八月）
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
2007年VOA标准英语（三月）
STEVE INSKEEP, HOST: World leaders meet in Morocco this week and vote on a United Nations' global migration compact. It is supposed to make migration more orderly and more humane. Joanna Kakissis reports that many Europeans are not enthused. JOANNA K
2018年NPR美国国家公共电台12月