Research results show that composite aids are more effective than single aids to sintered Si 3N 4 ceramics, in which the rare-earth oxides and MgO-Al 2O 3-SiO 2 composite aids are more attractive.是什么意思_Research results show that composite aids are more effective than single aids to sintered Si 3N 4 ceramics, in which the rare-earth oxides and MgO-Al 2O 3-SiO 2 composite aids are more attractive.在线翻译_英语_读音_用法_例句