dahllite

例句：

1. 1. The geologist found dahllite in the area where the volcano erupted.
   地质学家在火山爆发的地区发现了白垩土。
2. 2.The construction workers used dahllite to build the new bridge.
   建筑工人使用白垩土建造了新的桥梁。
3. 3. Dahllite is a type of sedimentary rock that contains calcium carbonate crystals.
   白垩土是一种含有碳酸钙晶体的沉积岩。