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。
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%。
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。
Some of the slowdown can be put down to challenging comparisons: China overtook the U. S. as the world's largest auto market last year, with sales up by around 50% last year.
销量的放缓可以部分归因于复杂的比较因素：去年中国超越美国，成为全球最大的汽车市场，去年的销量增长了约50%。
If there's a silver lining, it's that the market's moves-including lower oil prices and lower yields on government bonds, which push down mortgage rates-could end up helping the U. S. economy.
如果说还有好的一面的话，那就是当前的市场动向(包括油价走低、有助于压低抵押贷款利率的国债收益率下行等)可能最终会给美国经济带来帮助。
According to the U. S. Census Bureau, more than 543,000 small businesses are started in the United States every single month. Yet, somehow, more businesses shut down than start up each month.
美国人口普查局的资料显示，在美国，每月有超过543000个小公司成立，然而，每月总有更多的公司倒闭。
According gto the U. S. Census Bureau, more than 543,000 small businesses are started in the United States every single month. Yet, somehow, more businesses shut down than start up each month.
美国人口普查局的资料显示，在美国，每月有超过543000个小公司成立，然而，每月总有更多的公司倒闭。
He said that "History shows it makes no sense to give a quick up-or-down vote to bad trade deals like the TPP that will only ship jobs overseas and lower wages in the U. S."
他说，“历史证明给TPP这类贸易协定提供快速审批权毫无意义，它只会把就业岗位送到国外，并降低美国的薪水。”
He said that "History shows it makes no sense to give a quick up-or-down vote to bad trade deals like the TPP that will only ship jobs overseas and lower wages in the U. S."
他说，“历史证明给TPP这类贸易协定提供快速审批权毫无意义，它只会把就业岗位送到国外，并降低美国的薪水。”
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