ECDE should be diagnosed when OR>0.58or DTR>0.39,its posterior longitudinal ligament must be incised and extruded disc material should be removed completely.是什么意思_ECDE should be diagnosed when OR>0.58or DTR>0.39,its posterior longitudinal ligament must be incised and extruded disc material should be removed completely.在线翻译_英语_读音_用法_例句