Using the concept representative digit of approximate number, this paper analyses and consummates the signficant structure and reliable structure.
利用近似数表示数字的概念，分析和完善了近似数的有效结构与可靠结构。
This paper introduces the representative digit with respect to the approximate number,and point out the the difference of the approximate number from the real number;It constructs the real-valued structure and the representative structure,and provide the foundation to expose the structure and relation on the signficant digits and the reliable digits.
给出了表示数字的概念，明确了近似数与实数的区别；建立了近似数的实值结构与表示结构，为深入揭示有效数字与可靠数字的结构及关系奠定了基础。
alphanumeric representation of informatio
信息的字母 数字表示
One of a set of symbols, such as letters or numbers, that are arranged to express information.
字符用来表示信息的一组符号的一个，如字母或数字
Indicating a conversion from analog information to digital form.
表示模拟信息到数字信息的转换。
Of, relating to, or representing numbers.
数字的数字的，有关数字的，表示数字的
A symbol or word used to represent a number.
数字表示数的符号或字
The use of digits to represent alphabetic data.
用数字来表示字母数据的方法。
alphanumeric message processor
字母数字信息处理器
alphabetic information
按字母顺序排列的信息
a telegraph code in which letters and numbers are represented by strings of dots and dashes (short and long signals).
一种用一串点和破折号（长短信号）来表示字母和数字的电报代码。
a system of signals used to represent letters or numbers in transmitting messages.
用传输信息的方式来表示文字或数字的一种信号系统。
A generic name for a device that can store and process numeric and alphabetic in formation.
能存储和处理数字与字母信息的设备的总称。
Of, relating to, or expressed by an alphabet.
字母表的字母表的，用字母表示的或与之相关的
a display that gives the information in the form of characters (numbers or letters).
以数字或文字形式提供信息的显示器。
The Improvement of Students Symbol Sense;
学生符号感的培养——从“字母表示数”说起
a watch with a digital display.
用数字显示时间的表。
any notation for the representation of numbers.
表示数字的任何符号。
The symbol for the Roman numeral5.
表示罗马数字5的符号
A digital watch shows the time by electronically lit up numbers.
数字手表是通过电子显示数字来表示时间的。