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    <description><![CDATA[<h1 id="正则表达式regexregexp语法详细总结">正则表达式（Regex/RegExp）语法详细总结</h1>
<p>正则表达式是一套用于<strong>匹配、查找、替换、校验字符串</strong>的规则语法，被绝大多数编程语言、文本编辑器、数据库原生支持，核心是通过元字符定义匹配模式，实现精准高效的文本处理。</p>]]></description>
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