单词	背景砖片
释义	背景砖片background tile
随便看	database management system--dbms database management system{=dbms} database management systems database management system，dbms database management task database manager database manager interface database manipulation data base mapping database mapping database marketing database markup language database memory database metadata database model database modifier database normalization database object database of atomic and molecular physics database operating system utilities database operating system utility database operation database operator database optimization database organization