n.扩大；扩张；扩张物；膨胀物 变形： 复数：expansions 双语释义：n.(名词)[U]扩大,扩张,扩展,膨胀 action of expanding; state of being expanded[C]扩张物,膨胀物 sth which has been expanded英英释义： expansion[ ik'spænʃən ]n.the act of increasing (something) in size or volume or quantity or scope同义词：enlarg