单词：Cedrela sinensis
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-How does it work then? There are millions of insects out there in the air you sweeping. You target specific individuals.-That's right, so we have an individual honey bee which will be carrying this very small fine container on its back. And that's t
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By Nico Colombant Abuja 20 April 2007 Violence and delays are marking the hours before Saturday's (today's) presidential vote in Nigeria. Militant leaders in the oil-rich but restive south are vowing to disrupt the process. VOA's Nico Colombant repor
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The site was once a spring-fed pond, full of water. Mammoths were tempted in to drink. But when they tried to climb back out, the banks were steep and slippery. Just like the short-faced bear imprisoned underground, some became trapped. Scavengers wo
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By Stephanie Ho Washington 08 June 2006 U.S. officials have told Congress U.S. reconstruction efforts in Iraq are being significantly, and expensively, hampered by security concerns. This was among the issues raised as lawmakers grilled administrati
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