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
- grassland ownership
- Grassland People
- grassland planning
- grassland plant community structure
- grassland plant pathosystem
- grassland plots
- grassland primary productivity
- grassland productivity
- grassland property rights
- grassland protection
- grassland protection sciences
- Grassland Protection Volume III——Forage Pathology
- Grassland Protection Volume II—— Grassland Entomology
- grassland quadrat survey
- grassland quality improvement
- grassland raptors
- grassland reclamation
- grassland regeneration sowing
- grassland regionalization
- grassland reptiles
- grassland reseeding
- grassland Resources
- grassland resources
- grassland resources divisions
- grassland resources monitoring