If only one argument is provided and that argument is a string, document() treats the string as a URL and retrieves the document as a set of nodes.是什么意思_If only one argument is provided and that argument is a string, document() treats the string as a URL and retrieves the document as a set of nodes.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句