单词：Rubus doyonensis
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You can relax and go slow very slow on the CO Canal Ted Landphair | Washington, DC 29 April 2010 This is the famous Paw Paw Tunnel on the canal, through which boats could travel only one way at a time. The tunnel bypasses a section of the Potomac Riv
VOA标准英语2010年(四)月
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
yonyonson Mynameisyonyonson, IcomefromWisconsin, Iworkinthelumbermillsthere; EvygirlthatImeet WhenIwalkdownthestreetsays, hello,whatsyourname?andIsay
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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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