但是联军指挥官坚称，他们的轰炸目标政策和战斗准则皆未改变，战机出击比率也一直维持。

But coalition commanders insist that their targeting policy and the rules of engagement are unchanged and that the sortie rate has been maintained.

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如果没有所得收入税收减免，依据修订准则来得出的贫困比率会从15.7%升至17.7%。

Without the earned income tax credit, the poverty rate under the revised formula would jump from 15.7 percent to 17.7 percent.

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成本效益分比率准则——净利润现值低于零的无活力地区应该被承揽。

Cost-benefit ratio criterion----No activity where the present value of net benefits is less than zero should be taken.

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