文学 字符 释 sign 记号 与文字所记录的词在读音及意义上都没有联系的字符。
notation 记号，记法 symbol 符号，记号 token 标记，记号
notation 记法；记号 sign 记号，符号，正负号 token 记号
系统软件 语言与编译 释文 token 记号
- periodic inequality
- periodic infinite decimal fraction
- periodic inspection
- periodic instability
- periodic in the mean
- periodicity
- periodicity and symmetry of surface structure
- periodicity characteristic
- periodicity factor
- periodicity interval
- periodicity modulus
- periodicity of a function
- periodicity of a sequence
- periodicity relation
- periodicity theorem
- periodic law
- periodic law of elements
- periodic law of geographic zonation
- periodic maintenance
- periodic mapping
- periodic Markov chain
- periodic matrix
- periodic module
- periodic morphism
- periodic motion