The concept of regular expressions (regexps) -a notation for describing a pattern that matches a set of strings-is common across many programs and languages.
正则表达式(regular expression,regexp)是用于描述字符串集的匹配模式的概念，在很多程序和语言中都是通用的。
The concept of regular expressions (regexps) -a notation for describing a pattern that matches a set of strings-is common across many programs and languages.
正则表达式(regular expression,regexp)是用于描述字符串集的匹配模式的概念，在很多程序和语言中都是通用的。
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