anionn.阴离子；负离子anionic cleavage负离子裂解anion-radicalsn.阴离子基Anion surfaetant阴离子表面活性剂anionoid reagent类阴离子试剂anionic catalyst阴离子催化剂anion and cation阴阳离子anion-exchange阴离子交换体anionic exchanger阴离子交换剂anionic wet agent阴离子湿润剂anion precipitant阴离子沉淀剂