短語詞組短語extended relational data model 擴充關系數(shù)據(jù)模型relational data model formalities 上一節(jié)fuzzy relational data model 模糊關系數(shù)據(jù)模型vague relational data model Vague 關系數(shù)據(jù)模型The relational data model 關系數(shù)據(jù)模型Temporal relational data model 的繙譯是世俗關系數(shù)據(jù)模型multilevel relational data model 多層次關系數(shù)據(jù)模型Historical Relational Data Model 歷史關系數(shù)據(jù)模型 返回 relational data model