basic iron

例句：

1. 1.The discovery of this element is a milestone in the field of chemistry.
   这一元素的发现是化学领域的一个重要里程碑。
2. 2. The basic iron content in the soil is crucial for plant growth.
   土壤中的基本铁含量对植物生长至关重要。
3. 3.The basic iron deficiency can lead to serious health problems.
   基本铁缺乏可能导致严重的健康问题。