Rio de Janeiro, where DEN-3 has been the predominant circulating serotype for the past 5 years since the major DEN-3 epidemic in 2002, is now experiencing the renewed circulation of DEN-2.

自2002年发生登革3型病毒主要流行以来，登革3型病毒一直是里约热内卢过去5年中最主要的血清型。 当前，里约热内卢正经历新一轮登革2型病毒流行。

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Objective To study the roles of dengue (den) virus specific t cells in the pathogenesis of den virus infection.

目的研究登革病毒特异性T细胞在登革病毒致病中的作用。

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The results showed that Den. membranaceus has better physical properties than that of Den. yunnanicus, such as higher density, lower tangential and longitudinal dry shrinkage.

实验结果表明，黄竹的物理性能，如纵横干缩性等优于龙竹，而且黄竹的力学性能如静曲强度、静曲弹性模量及顺纹压缩与剪切强度也比龙竹高。

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Joris den Blanken is European climate policy director for Greenpeace International.

VOA: standard.2009.11.26

These are where the crews--we're passing by where the crews build their floats--Tuck's Den, Eden's Den--for Mardi Gras.

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At Idrees Ahmed's farm on the outskirts of Lahore, Sandy is kept in an air-conditioned den.

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Despite what Den suggest, I've never traded or divulged inside information in my life.

FORBES: Dow Jones Interactive