feron

例句：

1. 1. The iron ore is mined from the earth's crust.
   铁矿石从地球的地壳中开采。
2. 2. The ferric hydroxide reacts with water to form a red precipitate.
   铁的氢氧化物与水反应形成红色沉淀。
3. 3. The ferric nitrate solution is used as an effective rust inhibitor in industrial applications.
   铁的硝酸盐溶液在工业应用中作为有效的防锈剂。