Every individual starts with fitness 1 at point a and can raise its fitness based on how close it gets to point B. Every command "u", "d", "l", or "r" moves up, down, left, or right, respectively.

每个个体从a点开始，并且其适应性为1，然后个体可以根据它与b点的接近程度来增加它的适应性。命令“U”、“D”、“L”或“R”分别代表上移、下移、左移或右移。

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U. S. Ambassador to Thailand Eric John said the United States is not giving up its efforts to provide aid and expertise when Burma allows it.

美国驻泰国大使埃里克·约翰说，美国不放弃努力，仍然会在得到缅甸许可后提供援助及专业力量。

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U. S. policy makers will have to hope one of its chief economic rivals steps in to pick up the slack.

美国的决策者将不得不寄希望于其经济上的主要竞争对手之一能够介入，填补其退出造成的空缺。

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Under questioning, spokesman Wood said the ensuing North Korean retaliation was not a failure of U.S.diplomacy, but a failure by Pyongyang to live up to its international obligations.

VOA: standard.2009.04.15

More investment may also give the U.S. leverage to encourage China to open up its borders to U.S. firms, which are frequently hamstrung by onerous investment rules.

WSJ: The Game: A GM Unit in China's Hands

Krispy Kreme has since worked to bring its financials up to date with the U.S. Securities and Exchange Commission.

FORBES: Magazine Article

Recent threats from North Korea have led the Obama administration to reverse some of its previous decisions and to build up U.S. missile defenses.

CENTERFORSECURITYPOLICY: Obama��s ��Nuclear Zero�� Rhetoric is Dangerous