单词：Vallisneria denseserrulata
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President Obama is praising congressional negotiators for working out a deal on an overhaul of the rules governing Wall Street, and he is carrying his victory to Canada. This weekend in Toronto, I hope we can build on this progress by coordinating ou
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By Scott Stearns Dakar 25 September 2009 People waiting to be registered for assistance in the city of Rosso, Mauritania, 25 Sep 2009 Flooding in Mauritania may delay the start of the school year as people displaced by heavy rains are living in clas
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Baby Bats Can Learn Different Dialects Bats are sophisticated communicators. And not just when theyre in vampire form. New research finds that Egyptian fruit bats actually have regional dialects, depending on the bat chatter that surrounds them as th
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