Creates a resultant column that is a character expression.
产生一个字符表达式组成的新的列。
Character Expression and ImageInformation are Contradictory?
文字表述与图像信息有矛盾吗？
Read the infix expression from left to right, one character at a time.
从左到右读入中缀表达式，每次一个字符。
In this particular regular expression, we encounter the '[[: space:]]' character class.
在这个特别的规则表达式中，出现了' [[：space：]] '字符类。
Read the infix expression from left to right , one character at a time.
从左到右读入中缀表达式，每次一个字符。
The regular expression serves as character pattern to compare with the text being searched.
规则运算式可以做为与所要搜寻之文字进行比较的字元模式。
If an expression extends beyond a single line, you must use the line continuation character.
如果表达式超过一行，必须使用行继续符。
Repeat the single character, expression, whole single sentence or whole paragraph automatically or manually.
支持单个汉字，词组，整句以及整段的复读。
Repeat the single character, expression, whole single sentence or whole paragraph automatically or manually.
支持单个汉字，词组，整句以及整段的复读。
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