excidevt.切去(割掉)EXCn.开挖(激励器；排气关闭)exchanging vouchers兑换凭单excrescent reserves超额储备excitonic resonance激子谐振Excision of mastoid乳突切除术excretory urography下行性尿路造影术,排泄性泌尿系造影Excavating sequence开挖顺序excitonic insulator激子绝缘体exchang rate regime汇率制度Excresent gestation异位妊娠excavating cableway挖土用架空索道,开挖用索道