ballooned
vt.
膨胀，涨大（balloon的过去式与过去分词形式）;
例句:
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Membership has ballooned beyond all expectations.
会员的增加比预期的要快.
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In London, the use of the Tube has ballooned.
在伦敦，坐地铁的人激增。
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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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One effort ballooned over, Krul tipped another two wide.
来自THETIMES
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Cootehall's ballooned suburbs are empty.
来自THETIMES
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Official calculations suggest that the welfare bill has ballooned in recent times.
来自THETIMES