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Membership has ballooned beyond all expectations.会员的增加比预期的要快.In London, the use of the Tube has ballooned.在伦敦，坐地铁的人激增。The budget deficit has ballooned to $25 billion.预算赤字已经猛增到250亿美元。...
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vt.膨胀，涨大（balloon的过去式与过去分词形式）...
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Membership has ballooned beyond all expectations.会员的增加比预期的要快.The budget deficit has ballooned to $25 billion.预算赤字已经猛增到250亿美元。The budget deficit has ballooned to $25 billion...预算赤字已经猛增到250亿美元。In London, the use of the Tub...