Supporting NF 2 and multimedia data base system NFMDB is designed from the relational RDBMS and it is an externed DBMS.是什么意思_Supporting NF 2 and multimedia data base system NFMDB is designed from the relational RDBMS and it is an externed DBMS.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句