iron ions的用法和樣例：
例句
- Electrocatalysis of asorbic acid,dopmine,bromine, thallium and iron was studied at polyanline modified electrodes.
研究了聚苯胺修飾電極對抗壞血酸，多巴胺，溴，鉈及鐵離子的電催化作用。 - Examples include the cytochromes, which require ferrous or ferric ions for activity.
例如細胞色素要結合亞鐵離子或三價(jià)鐵離子才具有活性。
