对于选出的每个节点，将在return子句中计算表达式，在这里是标记(标签)与代码(提取出每个节点的元素的内容)的混合。
For each of these nodes, it computes the expression in the return clause, which here is a mix of markup (the tags) and code (extracting the contents of the element of each node).
虽然从DB 2ContentManager提取的内容是动态生成的，但查询表达式是在开发人员创建Connect标签时确定的。
Although the content extracted from DB2 content Manager is dynamically generated, the query expression is determined when the developer creates the Connect tag.
上面的正则表达式匹配h 1标签以及标签内的所有内容。
The above regular expression is looking for an h1 tag and all of its contents.
上面的正则表达式匹配h 1标签以及标签内的所有内容。
The above regular expression is looking for an h1 tag and all of its contents.
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