Resin-OsO_4 catalyst was prepared by an improved procedure using quaternary ammonium salts covalently bound to Merrifield resin as ion-exchanger.是什么意思_Resin-OsO_4 catalyst was prepared by an improved procedure using quaternary ammonium salts covalently bound to Merrifield resin as ion-exchanger.在线翻译_英语_读音_用法_例句