文学 语义学 释 meta-language 元语言 用来描述或指称语言的语言或符号。又称纯理语言、符号语言。与对象语言（object language）相对。
metalanguage 元语言
＞数理逻辑与数学基础＞证明论＞释义 metalanguage 元语言 metalanguage 元语言†
系统软件 语言与编译 释文 meta language 元语言
- maintenance policy
- maintenance program
- maintenance program of aircraft
- maintenance project of Guangji Temple ancient buildings in Jinzhou, Liaoning
- maintenance rate
- Maintenance Regulation
- maintenance & rehabilitation on airfield area
- maintenance requirement
- maintenance requirement of aircraft materiel
- maintenance respiration
- maintenance scheduling of electric power system
- maintenance service program
- maintenance standby time
- maintenance strategies for civil engineering
- maintenance strategy of aircraft materiel
- maintenance theory
- maintenance therapy
- maintenance time
- maintenance work order management
- main test
- main theorem
- main title music
- Main-Traveled Roads
- main tree species
- main variable