A Backlund transformation for the modified Korteweg-de Vries equation,and the mixed Korteweg-de Vries equation,, is presented.是什么意思_A Backlund transformation for the modified Korteweg-de Vries equation,and the mixed Korteweg-de Vries equation,, is presented.在线翻译_英语_读音_用法_例句