bournonite

例句：

1. 1. The chemist used bournonite to create a new type of fertilizer.
   化学家使用硼砂创造了一种新型的肥料。
2. 2. The farmer mixed bournonite into the soil to improve its nutrient content.
   农民将硼砂混入土壤以改善其营养成分。
3. 3. The bournonite was used as a preservative in food storage.
   硼砂被用作食品储存中的防腐剂。