Warning: file_put_contents(/www/wwwroot/ppbbbu/202081.com/cache/ba6971e012bc58362ff56068bb222270.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 Hiltz是什么意思，Hiltz的翻译，Hiltz音标、读音、用法和例句_2020年的事情英文词典
Tu &McIsaac, 2001;Hiltz, 1998).The definition of an online learning community is still evolving and remains obscure (Office of Learning Technologies, 1998). 然而，在线学习共同体的定义仍旧在发展中并处于模糊阶段。