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 Custody Clerk保安人员Secobutobarbitone sodium仲丁比妥钠securities of fixed asset存量资产证券化Securities Assets' Pricessecurities price accuracy证券价格准确性Securities Exchasnges Act证券交易法seco-neokadsuranic acid原新五味子烷酸Secchi depth transparency透明度securities and protection安防securities system of bank银行证券系统