"U" stands for understanding.

代表理解。

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Alternatively, the ‘U’ modifier may be used to make all repetiton operators lazy. Differentiating between greediness and laziness is key to fully understanding advanced regular expressions.

区分贪婪模式与懒人模式是完全理解高级正则表达式的关键。

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Sustained and reliable U. S. -China military-to-military relations reduce mistrust, enhance mutual understanding and broaden cooperation, the report says.

报告称，持续与可信的中美军事交流会减少误解、增强理解以及加强合作。

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But Nye tells VOA that while the power of U.S.ideas and its ability "to deter Soviet aggression" are essential to understanding the end of the Cold War, neither are root causes.

VOA: standard.2009.11.03

The quite obvious implication of this fuller understanding of Shariah is that one cannot speak of Shariah-compliant finance, business, or economics in the U.S. without understanding Shariah as articulated by the Shariah authorities and its ramifications for the U.S. investor.

CENTERFORSECURITYPOLICY: Shariah��s Black Box

Pakistani officials believe they have an understanding with U.S. officials to halt the strikes until relations have improved.

WSJ: U.S. Erred in Deadly Attack

But I think these latter risks are relatively easier to analyze right now compared to the challenge of understanding the U.S. debt picture.

FORBES: Don't Like Treasuries Right Now? Try Corporate Bonds