In this sample output, no email information was returned for a qualifying customer (Lisa Hansen) because this element didn't exist in her XML "contactinfo" document.
在该示例输出中，没有返回符合条件的客户(LisaHansen)的电子邮件信息，因为该元素不存在于她的XML “ contactinfo ”文档中。
In this sample output, no email information was returned for a qualifying customer (Lisa Hansen) because this element didn't exist in her XML "contactinfo" document.
在该示例输出中，没有返回符合条件的客户(LisaHansen)的电子邮件信息，因为该元素不存在于她的XML “ contactinfo ”文档中。
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