landform forming process

例句：

1. 1.The formation of the mountain range is a result of erosion and sedimentation over millions of years.
   山脉的形成是数百万年侵蚀和沉积的结果。
2. 2. Landforms are formed by the interaction between the Earth's crust and its mantle.
   地形是由地球的地壳与地幔相互作用形成的。
3. 3. The study of landforms helps us understand the geological history of our planet.
   研究地形有助于我们了解地球的地质历史。