second normal form 第二范式，第二正规形式
数据库 数据库理论 释文 second normal form, 2NF 第二范式
- elementary volume
- elementary wave
- elementary work
- element at infinity
- element bioavailability analysis for geochemical samples
- Element comparison method
- element composition of crude oil
- element concentration
- element concentration gradient
- Element counting method
- element damping matrix
- element-deficient nutrition solution
- element divisible on the left
- element divisible on the right
- element enrichment factor method
- element finite element equation
- element formation
- element group
- element hypergenic mobility
- elementide
- element innovation
- element locally zero
- element mass matrix
- element migration
- element mobility