ex·pand

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【释义】：

vt．❶ 扩张，使膨胀：expand armed forces扩张武力．❷ 扩展，发展：expand reproduction扩大再生产．expand an algebraical expression演算代数式．

－vi．❶ 扩大，膨胀：The city has now expanded to three times its original size．这座城市已扩大到它原来面积的三倍．❷ 展开：The flower buds have not yet expanded．花蕾还没有开放．❸ 舒畅，洋溢：Our hearts expanded with joy．我们喜气洋洋．