tetrad 四元组，四分体
four combination 四元组 quad 四角形区域，四元组 quadruple 四元组；四重的，四倍的 quadruplet 四元组 quaternary 四进制的，四元的；四元组 tetrad 四元组 vierbein 四元组
系统软件 语言与编译 释文 quadruple 四元组
- syntactic change
- syntactic code
- syntactic completeness
- syntactic connection
- syntactic consistency
- syntactic definition
- syntactic exchange
- syntacticization
- syntactic language
- syntactic language model
- syntactic metalanguage
- syntactic pattern recognition
- syntactic picture parsing
- syntactic reconstruction
- syntactic rule
- syntactics
- syntactic structural ambiguity
- syntactic structure
- syntactic subordination tree
- syntactic system
- syntactic theorem
- syntactic tree
- syntactic type calculus
- syntactic valence
- syntactic variable