数据库 数据库理论 释文 constraint relational model 约束关系模型
- digital certificate
- digital chart
- digital chart production system
- digital cinema distribution master
- digital cinema projector
- digital circuit
- digital citizenship
- digital city geospatial framework
- Digital City Management
- Digital city management
- digital collaborative management
- Digital collection
- digital collection
- digital collection development policy
- digital colorist
- digital communication
- digital communication network
- digital communication system
- digital compact disc rocordable
- digital component engraving
- digital component making
- digital component processing
- digital compositing
- digital computer
- digital concrete transport control