cavern filling

例句：

1. 1. The cavern was filled with a variety ofminerals and rocks.
   这个洞穴里充满了各种矿物质和岩石。
2. 2. The cavern fillingis made from recycled materials to reduce waste.
   洞穴填充物是由回收材料制成的，以减少废物。
3. 3. The cavern fillinghas been tested for its safety and durability.
   洞穴填充物已经经过测试，以确保其安全性和耐用性。