Retiform Sertoli-Leydig cell tumor with heterologous elements: a report of 1 case and review of literature 卵巢网状型Sertoli-Leydig细胞瘤伴异源成分1例报道并文献复习
The technology of database develops from hiberarchy database, retiform database to relational database, even OO database, that has become to the base of information system. 数据库技术经历了从层次数据库、网状数据库到关系数据库以及面向对象数据库的发展,已成为计算机信息系统中的重要基础和支柱,并在传统的商业和事务处理等领域内趋于成熟。