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.

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词干推导根据语法变化得出词汇表中已有单词的派生形式，包括动词的变化，比如write、wrote和written，或名词形式，比如mouse和mice。

Stem derivation finds derived forms of in-vocabulary words based on grammatical inflection, including verb conjugations such as write, wrote, and written, or noun forms such as mouse and mice.

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词干与词相似，它是可以加词缀的任何一个词素或词素结合体。

An "affix" is the collective term for the type of formative that can be used, only when added to another morpheme (the root or stem).

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