理学 数据库系统 释 relational database 关系数据库 采用关系模型的数据库。 理学 云计算 释 relational database 关系数据库 采用关系模型（relational model）来组织数据的数字数据库，一种可以存储数据，也可以选择性进行功能实现的永久性存储机制。
数据库 数据库管理系统及其实现技术 释文 relational database 关系数据库
- precarburization
- precast
- pre-cast concrete
- precast concrete double T slab
- precast concrete frame-shear wall(core wall)structure
- precast concrete frame structure
- precast concrete frame structure with specially shaped columns
- precast concrete shear wall structure
- precast concrete structure
- precast concrete track beam
- precast pavement
- precast prestressed composite floor slab
- precast prestressed hollow floor slab
- pre-cataclysmic binary
- pre-cataclysmic variable
- precategory
- precaution
- precautionary approach
- precautionary demand for money
- precautionary principle
- precautionary principle of biosafety assessment
- precautionary principle of EMF
- precaval vein
- precedance relation in dependency tree
- precedence