In programming, a regular expression is written in a formal language, also known as regex or regexp.

在编程中，正则表达式是用一种形式语言编写的，也称为regex或regexp。

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In programming, a regular expression is written in a formal language, also known as regex or regexp.

在编程中，正则表达式是用一种形式语言编写的，也称为regex或regexp。

youdao