It is relatively easy to build an XML document from RDBMS tables, but not to store them because XML documents are hierarchical and almost free format.是什么意思_It is relatively easy to build an XML document from RDBMS tables, but not to store them because XML documents are hierarchical and almost free format.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句