kurnakovite

例句：

1. 1. The kurnakovite formation is a unique geological feature in the region.
   库尔纳科夫石是一种该地区独特的地质特征。
2. 2. The kurnakovite stone has been used as a medicinal material for centuries.
   库尔纳科夫石被用作数百年来的药用材料。
3. 3.The kurnakovite formation contains minerals that are rare and valuable.
   库尔纳科夫石含有稀有且有价值的矿物。