现有方法可能涉及根据词的词干或变音位构建正则表达式，以及其他搜索词的语言派生词。
Existing approaches might involve building a regular expression based on stems of a word, or metaphone, and other linguistic derivatives of a search term.
词干可以是粘着词根，自由词素和一个派生词。
A stem can be a bound root, a free morpheme, or a derived form itself.
词干可以是一个黏着词根、自由语素或者本身就是一个派生词。
A stem can be a bound root, a free morpheme, or a derived form itself.
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