锰铁

例句：

1. 1.Manganese is an essential element forthe human body.
   锰是人体必需的元素。
2. 2.The steel industry heavily relies on manganese to improve its properties.
   钢铁工业严重依赖锰来改善其性能。
3. 3. The manganese in the soil can affect plantgrowth and yield.
   土壤中的锰会影响植物生长和产量。