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
- Oil-Gas Field Surface Engineering
- oil-gas geo-drilling
- Oil & Gas Journal
- oil & gas metering separator
- oil-gas mixture transportation
- oil-gas pipeline maintenance
- oil/gas pipeline prevention and control
- oil & gas production separator
- oil-gas suspension
- oil-gas transition zone
- Oil&Gas&Water Pipeline
- oil-gas-water separation
- oil-gas-water separator
- oil-Gas-Water System
- oil-gas-water three phase flow experiment
- oil-gas-water three-phase flow regime
- oil & gas well drilling techniques
- oil gathering lines
- oil gathering process
- oil gathering process for crude blending with vapor
- oil gathering process for high pour-point crude oil
- oil gathering process for hydraulic piston pump production
- oil gathering process with branching network
- oil gathering process with loop single pipe and mixing water
- oil gathering process with mixing active water