A word boundary is the position between a word and a space.

字边界是单词和空格之间的位置.

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Whether a field may overlap a word boundary is implementation - defined.

字段是否能覆盖字边界由具体的实现定义.

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Matches only when not at a word boundary.

只有不在单词边界时才匹配.

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Added non - capture group and word boundary anchor.

添加 非 捕获分组和单词边界标记.

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The character which when preceded by an escape character represents the word boundary assertion.

前跟转义字符用于判断单词边界的字符.

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The character which when preceded by an escape character represents the non - word boundary assertion.

前跟转义字符用于判断 非 单词边界的字符.

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