他说，美国坚定承诺对非洲的帮助。

He says America's commitment to help is strong.

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在承诺世行支持巴基斯坦的坚定承诺时，沃尔福威茨说，理由是显而易见的。

In pledging the Bank's strong commitment to support Pakistan, Wolfowitz said the reasons were obvious.

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脊灰工作还告诉我们，对雄心勃勃的目标做出坚定承诺会带来回报。

Polio also tells us something about the rewards of steadfast commitment to ambitious goals.

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