New structural details illustrate how a promising class of antibodies may block human immunodeficiency virus (HIV) -1 infection and reveal valuable clues for design of an effective HIV-1 vaccine.

新的结构上的细节揭示一组潜在的抗体如何能够阻断人类免疫缺陷病毒(HIV) - 1的感染，并为设计有效的HIV - 1疫苗提供了有价值的线索。

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And sunscreen makers have been promising that their lotions block both.

防晒霜制造商们也保证过他们的产品可以同时防御两者。

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The macro and micro influence factors of Xi'an office block market are investigated; the result shows that this project has a promising future.

然后对西安写字楼市场宏观和微观影响因素进行了大量调查，结果表明本项目具有良好的市场前景。

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Without this approach, groupthink, overly vocal members or real or perceived hierarchy will suppress (production block) the most promising out of the box ideas.

FORBES: When Innovation Fails

It has expressed its anger with Russia not by invoking sanctions like the cutting back of the G8 to the old G7 without Moscow or by seeking to block Russian entry into the World Trade Organization, but by promising to help reconstruct a ravaged Georgia.

CNN: Analysis: Can Europe stand firm against Russia?

Since 1999, select art funds, investors and private collectors have attempted to profit from rapidly rising auction totals by promising to purchase a work of art at a mutually agreed-upon price before it hits the block.

FORBES: Can You Take the Risk Out of Buying Art?