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。

youdao

U. S. sales are down 7.4% in 2007 through the end of August, though they are up 1.5% globally.

截至2007年8月底，通用汽车在美国市场的销量下降了7.4%，但该公司全球销量在此期间增长了1.5%。

youdao

Over the past three years, in the wake of the financial crisis, U. S. borrowing costs have gone down, not up.

过去的三年里，随着金融风暴而来的是美国借贷费用的下降而不是上升。

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The U.K. is already a way down this path with the U.S. coming up behind.

FORBES: Apocalyptic Financial Horror On Deck If Europe Fails

On days when the process moves in the forward direction, the euro is bid up, the yen is bid down, and stocks in the U.S., Europe and Australia are bid up.

FORBES: Magazine Article

In 2006 emissions in EU countries participating in the cap-and-trade program went up while U.S. emissions went down.

FORBES: Brrr!