secyn.秘书SECadj.(香槟酒等)无甜味的abbr.第二的(=second)；（=U.S. Security and Exchang Commission） 美国证券交易委员会securities dealing tax证券交易税Securities Enforcement证券执法securitization ability资产证券化能力securities information证券信息securities trading tax证交税securities underwritern.证券包销商securities legislation证券立法secundum porta hepatis第二肝门secundibrach distichal二级腕板securities association证券业协会