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As you've probably experienced firsthand, some mosquito species have a real taste for warm, human blood. So much so that if you raise them on it the lab, they'll accept no substitute. Fortunately, I don't get major reactions at all. Brad Main is a mo
2016年Scientific American(九)月
By Cindy Saine Washington 22 August 2007 U.S. officials say a recent surge of violence in Afghanistan has not hurt reconstruction efforts in the eastern part of the country. U.S. officials based in Jalalabad briefed reporters Wednesday via satellite
2007年VOA标准英语（八月）
By Siri Nyrop Nangahar Province, Afghanistan 27 May 2008 Afghanistan supplies virtually all of the world's illegal opium. Last year, the country's drug trade was a$4-billionbusiness, half of which alone was produced in the south where the fighting ag
VOA标准英语2008年（五月）
ROME, Dec. 3 (Xinhua) -- Italy lacks the necessary energy(能量,活力) and strength for an economic revival while unemployment and poverty are on the rise, warned a report issued Friday. The 44th edition of the Censis think tank social survey, the
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In Africa's battle against malaria, two low-tech tacticsinsecticides and bed netshave done a decent job killing off mosquitoes. But it's mainly one species that's been affected. That's a species called Anopheles gambiae, sometimes called the African
2016年Scientific American(八)月
You might not think there would be that many people in the world prepared to devote lifetimes to the study of something so inescapably low key, 你或许会认为，世界上不会有多少人愿意花毕生的心血来研究那个不起眼儿的东西
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