sequestrum

例句：

1. 1. The geologists are studying the sequestrum in the area for potential mineral resources.
   地质学家正在研究该地区的矿床，以寻找潜在的矿物资源。
2. 2.The mining company has been extracting valuable minerals from the sequestrum for decades.
   这家矿业公司几十年来一直在从矿床中提取有价值的矿物。
3. 3. The sequestrum is a complex system of underground veins that contain valuable metals.
   矿床是一个复杂的地下脉系统，其中含有有价值的金属。