单词：wild-type strain
单词：wild-type strain 相关文章
The flu epidemic intensified a few week ago, but it continued to worsen with widespread outbreaks being reported in every state except Florida. NBC's Robert Bazell reports. And there's new information tonight about this year's flu epidemic and why i
万花筒2008年
DAVID GREENE, HOST: And we're going to spend some time now in China's far northwestern region, Xinjiang, which is four times the size of California. It's home to a Muslim minority group called the Uighurs. They have had this tense relationship with C
2017年NPR美国国家公共电台9月
By Margaret Besheer Washington 18 February 2006 French officials have confirmed the first case of the deadly H5N1 strain of bird flu in their country. The virus was found in a wild duck in southeaster
2006年VOA标准英语（二月）
Do you like birds, Ben? 本，你喜欢鸟类吗？ Sure! I see them around my house. They like my trees. 当然！我在我家附近看到过。它们喜欢我的树。 I like birds, too. Birds are very interesting. And there are so many different t
大家说英语
By Lisa Bryant Paris 15 February 2006 Experts meeting in Brussels Wednesday and Thursday are promoting a series of measure to fight the spread of bird flu in the European Union. The meeting comes as n
2006年VOA标准英语（二月）
By Lisa Schlein Geneva 24 December 2007 The World Health Organization says the most infectious type of polio could be eradicated worldwide by next year, leaving only one more strain of the disease to be tackled. WHO, which began its global polio erad
VOA常速英语2007年（十二月）