理学 数据库系统设计 释 semantic data model 语义数据模型 一种基于高层语义的数据库描述和结构形式，是具有较强的语义功能的模型。
数据库 数据库应用开发 释文 semantic data model 语义数据模型
- pounder
- Pounding Clothes
- pound net fishing
- pounds per cubic foot
- pounds per foot
- pounds per gallon
- pourable
- Pourbaix diagram
- pouring
- pouring operation safety
- pour point
- pourpoint
- pour point depressant
- Pour point Depressed transportation
- pour point of crude oil
- pouvoir constituent
- poverty
- poverty action lab
- poverty alleviation by social force
- poverty alleviation loans
- poverty alleviation program
- poverty alleviation programmes
- poverty alleviation project of World Bank
- poverty alleviation through employment
- poverty alleviation through technology