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
- BELLE
- Belle experiment
- Bellerophon
- belles-lettres
- Belles-Lettres in China and Their History
- Bell-Evans-Polanyi principle
- Belle Ⅱ Experiment
- BelleⅡ实验
- Belle实验
- bellflower
- bellflower family
- Bell formula
- Bell Howell Co.
- belligerents
- Bell inequality
- Bellingham gasoline pipeline explosion
- Bellingshausen crater
- Bellingshausen Sea
- Bellini family
- Bellini，Vincenzo
- Bellinsgauzen crater
- Bell-Lancaster system
- Bell-Lapadula model
- Bellman
- bellman dynamic programming