Existing approaches might involve building a regular expression based on stems of a word, or metaphone, and other linguistic derivatives of a search term.

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。

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A regular expression can filter for a specific location, such as the start or end of a line and the beginning and end of a word.

正则表达式可以过滤特定的位置，例如行的开始或结束，以及单词的开始和结束。

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When an expression is being parsed, the parser should emit the word "INTERSECT" whenever it parses "and" and "UNION" whenever it parses "or".

在解析一个表达式的时候，解析器每当解析“AND”时就发出字“INTERSECT”，而解析“OR”时就发出“UNION”。

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Its mime-trained members have reintroduced physical expression into a theatre which had become word-bound, and developed an intense style far from traditional naturalism.

ECONOMIST: Repertory theatre in Britain

Nevertheless, one close ally of the prime minister told me that his colleague should not be put through the mill for a "momentary expression of exasperation" and said that he would be very surprised if the "pleb" word would have been used.

BBC: Andrew Mitchell: It doesn't look good