"Whereas if you send seeds, they have to be planted, they have to cultivated, they have to be harvested before there's an impact."
VOA: standard.2010.07.16
Whereas a lot of studies are limited to basically asking, 'Did you have a fever in the last month or six months?'" Sarah Olson's study appears in the July issue of the journal Emerging Infectious Diseases, which is published by the U.S.Centers for Disease Control and Prevention.
VOA: standard.2010.06.17
应用推荐