karst landform

例句：

1. 1.The karst landforms in the area are unique and fascinating.
   该地区的喀斯特地貌独特且引人入胜。
2. 2.The karst landforms have been formed over millions of years through the process of erosion.
   喀斯特地貌是通过数百万年侵蚀过程形成的。
3. 3. Due to their unique features, karst landforms are often used as a reference for geological studies.
   由于其独特的特征，喀斯特地貌常被用作地质研究参考。