数字-数字数据变换器
digital-to-digital data converter
终端字符字符串
null-terminated character string Null
带正负号数字数字系统
signed digit number system
汉字字符数据库
Chinese character Database
汉字字符数据类型
Chinese character data type
手写数字字符
handwritten numerals character
数字字符参引
numeric character reference