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secnetio bufonis poisoning蟾酥中毒Sec - IP security option安全选项securities investment risk证券投资风险securities register system证券登记系统securities operation trust证券经营信托securities finance company证券融资公司securities investment fund证券投资基金securities market function证券市场功能securities transaction law证券交易法sec-butyl isothiocyanate异硫氰酸仲丁酯