爆炸，爆发；激增
花费，消耗，消费
扩张，张开，展开
探索；探测；探险
expand [ɪk'spænd; ek-] vt. 扩张；使膨胀；详述 vi. 发展；张开，展开
eg: Engineers noticed that the pipes were not expanding as expected.工程师们注意到管子并未像预期的那样膨胀。
