redoubled
v.
进一步加强，大大增加( redouble的过去式和过去分词 );
再加倍，翻两番;
例句:
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The applause redoubled.
掌声加倍热烈。
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The output of the factory has doubled and redoubled.
该厂产量成倍增长.
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The fox redoubled on its trail to escape the hunters.
那狐狸循原路折回逃避猎人.
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She redoubled her prayers, and Robert's faith...returned.
来自P. Dally
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He redoubled his efforts in literary self-improvement.
来自J. Halperin
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Rather than slow down, though, he redoubled his training.
来自NEWYORKER