它可以让你搜索更加精准的词组，“所有词组”或者是适当的搜索框里输入词组的某一个特定关键词。
This lets you search for exact phrases, "all these words", or one of the specified keywords by entering search terms into the appropriate box.
那种调整就是把“一切”定义成一个有限的集合，集合内所有的元素都可以被获悉——例如，定义所有的词组有一个固定字符数的上限。
That adjustment is to define "everything" as a finite set, all of whose members can be known-for instance, all phrases containing a fixed maximum number of characters.
此工具将产生两个单独的搜索词组列出了所有可能的组合。
This tool will generate all possible combinations of two separate lists of search phrases.
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