理学 数据库系统设计 释 entity-relationship model 实体关系模型 通过客观事物及其联系进行形式化描述的数据模型。又称实体-联系模型、E-R模型。
数据库 数据库理论 释文 entity-relationship model 实体-联系模型
- microanalysis of metals
- micro [analytical] balance
- micro analytical balance
- microanalytical system
- micro-analytic hyperfunction
- micro-analyticity
- microanalyzer
- microanaphoretic
- micro-and nano-additive manufacturing
- micro and nano characterization
- micro- and nano- flows
- micro and nano mechanics
- micro-and nano-porous flow
- micro-and nanoscale flow
- micro and nanoscale liquid/liquid interface
- microangiography
- micro-antenna
- microantibody
- microaphanitic
- micro-approach
- microarchitecture
- micro arc oxidation
- micro-arc oxidation
- micro-arc oxidation coating
- microarcsec