数据库 数据库理论 释文 first normal form, 1NF 第一范式
- ecological suitability assessment
- ecological system
- ecological systems theory
- ecological tea gardens
- ecological theology
- ecological theory of administration
- ecological threshold
- ecological town
- ecological transition
- ecological treatment model of rural domestic sewage
- ecological trend study
- ecological type
- ecological unit
- ecological validity
- ecological value
- ecological value of forest
- ecological veterinary science
- ecological view of Chinese landscape architecture
- ecological water
- ecological water demand
- ecological water level
- ecological water requirement
- ecological water utilization
- ecological zoning
- ecology