The clinical observation of equivalent dose tramodol,Fentanly and Sufentanil for postoperative patient controlled intravenous analgesia in elderly patients是什么意思_The clinical observation of equivalent dose tramodol,Fentanly and Sufentanil for postoperative patient controlled intravenous analgesia in elderly patients在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句