穴裂口

例句：

1. 1. The miners were digging a tunnel to reach the treasure.
   矿工们正在挖掘一条隧道以到达宝藏。
2. 2. The cave was filled with stalactites and stalagmites.
   洞穴里充满了石笋和石柱。
3. 3. The engineers were excavating the foundation for the new building.
   工程师们在为新建筑挖掘地基。