单词：carrier catalyst
单词：carrier catalyst 相关文章
By Art Chimes San Francisco 16 February 2007 One of the world's largest annual science conferences has opened in San Francisco. VOA's Art Chimes reports that this year's theme links science and a sustainable world. The head of the group sponsoring th
2007年VOA标准英语（二月）
By Noel King Kigali 08 September 2007 Humanitarian aid groups are sounding the alarm as fighting in the eastern Democratic Republic of Congo forces tens of thousands of civilians from their homes in North Kivu Province. Noel King has more in this rep
2007年VOA标准英语（九月）
This is the VOA Special English Health Report. Researchers say more than half of young people who use MySpace often discuss high-risk behaviors. Two studies of the social networking site recently appeared in the Archives of Pediatric and Adolescent
VOA慢速英语2009年（二）月
This is the VOA Special English Economics Report. April is National Financial Literacy Month in the United States. As the country faces a deep recession, Americans are paying closer attention to personal finance. Some critics partly blame the crisis
VOA慢速英语2009年（四）月
By Lisa Schlein Geneva 06 August 2007 The World Health Organization says all countries, with the exception of Indonesia, are sharing their avian influenza viruses. WHO says the failure to share virus samples could retard the development of an effecti
2007年VOA标准英语（八月）