数字字符

From 1 to 20 alphanumeric characters.

从1到20个字母数字字符。

For example, to find the first non-numeric character of a string, we can write

例如，如果要在 string 对象中寻找第一个非数字字符，可以如下编写程序

By having one character called Letters (usually marked LTRS on the keyboard) which means "all the characters that follow are alphabetic characters," and having one other key called Figures, meaning "all characters that follow are numerals or punctuation characters," the Baudot character set can represent 52 (26 x 2) printing characters.

通过使用一个被称为字母的书写字符（键盘上通常标注为LTRS），其意思是"其后所有书写字符是指目标书写字符"，一个被称为数字的按键，意思是"其后所有书写字符是数字或标点符号字符"，博多码字符即可以代表52（26 x 2中打印字符。

One or more of the previous expression e.g., \d+ matches one or more digit

匹配一个或更多例如， \d+匹配一个或多个数字字符

For example, consider the following small problem: You have a list of numbers and a string of characters; you would like to construct a list of all pairs that consist of a number from the list and a character from the string, but only if the ASCII ordinal is larger than the number.

比如，考虑下面这个简单的问题：你有一个由数字组成的列表和一个由字符组成的字符串；你要构建另一个列表，它的元素就是列表中一个数字和字符串中一个字符的配对，而这个字符的 ASCII 码必须比这给数字大。

Firstly, the system is divided into four sub systems: Chinese characters recognition system, character recognition system, recognition system including characters and digits, and digital recognition system; Secondly, the statistic information about left scan line free length of every character is used as a group feature of car plate, which will accomplish the recognition together with statistic template by weighted sum.

首先将车牌字符识别分成四个子识别系统——汉字识别系统、字母识别系统、字母和数字混和识别系统，以及数字识别系统；然后选择各字符的左扫描线空程长度统计信息作为车牌字符的一组特征，与统计模板进行加权组合，来共同完成车牌字符的识别工作。

In telegraphy, a printer which converts a Morse code signal to an alphanumeric character and then prints it.

在电报技术中，将莫尔斯电码信号转换成字母数字字符，然后把它打印出来的一种打字机。

For these functions, a printable character is a character with a visible representation; whitespace is one of space, tab, vertical tab, return, newline, and formfeed; and punctuation is a printable character that is not a digit, a letter, or whitespace character such as space.

表中的这些函数，可打印的字符是指那些可以表示的字符，空白字符则是空格、制表符、垂直制表符、回车符、换行符和进纸符中的任意一种；标点符号则是除了数字、字母或空白字符以外的其他可打印字符。

The control word is then delimited by a space or a nonalphabetic or nonnumeric character in the same manner as any other control word.

这时，控制字通过一个空格或非字母数字字符分隔出来，和分隔其他控制字的方式相同。

USE NorthwindGO-- First line of a multiple-line comment.

所有字母数字字符或符号均可用于注释。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。