理学 系统模型 释 metamodel 元模型 定义概念并提供用于创建构建模型的构建元素（语言和过程）对一种描述性模型的简化或者近似的另一种描述性模型。 理学 元模型体系结构 释 meta model 元模型 元模型体系结构中的一个层次。
软件工程 释文 meta model 元模型
- requirements extraction
- Requirements for Biological Products
- requirements for periodic inspection of pressure vessels
- requirements for use of tools on construction site
- requirements inspection
- requirements management
- requirements modeling and analysis
- requirements of litigation
- requirement specification
- requirements phase
- requirements refinement
- requirements review
- requirements specification
- requirements specification language
- requirements traceability
- requirements verification
- requisite
- Requisite Knowledge for the Al-chemical Laboratory
- requisitioned labor service
- requisition in emergency
- R-equivalence
- R-equivalence class
- RER
- reradiate
- re-radiation