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.
这个组件把服务的名称当做输入(通常由几个词组成)，并返回一个组成此名称的词的清单。
This component takes as input the name of service, which is usually composed of several words, and returns a list of words that constitute that name.
输入一个词或词组以搜索所有文本，也可从下拉列表中选择以前的搜索过的字符串。
Enter ra word or phrase to search all text or select a previous search string from the drop-down list.
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