Valid mask characters include all printable characters , which include letters , digits , punctuation , symbols and the space character 有效的掩码字符包括所有可打印字符，其中包括字母、数字、标点、符号和空白字符。
Valid input characters include all printable characters , which include letters , digits , punctuation , symbols and the space character 有效的输入字符包括所有可打印字符，其中包括字母、数字、标点、符号和空白字符。
A special character , for example tabstop or paragraph break that is normally hidden and cannot be printed , but which can optionally be displayed 非打印字符：某个特殊字符,如制表符或者段落截止符，通常隐藏不能被打印但可显示出来。
In character recognition , a condition in which the characters spacing reference lines of two consecutivelyprinted characters printed on the same line are separated by less than a specified distance 字符识别中的一种情形,其中同一行上两个连续打印字符的字符间隔参考线的间距小于指定的距离。
In character recognition , a condition in which the characters spacing reference lines of two consecutively - printed characters printed on the same line are separated by less than a specified distance 字符识别中的一种情形，其中同一行上两个连续打印字符的字符间隔参考线的间距小于指定的距离。
Another point to be aware of is the need to tell zsh which characters form escape sequence in a prompt , otherwise it will assume they are all printable characters , and position the cursor incorrectly 另一个需要注意的是需要告诉zsh在提示符中哪些字符构成换码序列，否则就会假设它们都是可打印字符，光标的位置就会出错。
A printer in which embossed characters on short type bars attached to a belt move along the line to be printed and are selectively struck from behind by a solenoid as they pass the printing position 一种打印机，打印字符刻在活字条上并固定在一条可沿可印行运动的带子上，当打印字符通过打印位置时，螺线管就选择字符，从后面击打，而完成打印。
