地形学上的

例句：

1. 1. The mountain range is the most impressive feature of the region's terrain.
   山脉是该地区最引人注目的特征。
2. 2. The engineer studied the terrain before building the bridge.
   工程师在建造桥梁之前研究了地形。
3. 3. The terrain in this area is very difficult to navigate due to its steep slopes.
   由于其陡峭的坡度，这个地区的地形非常难以导航。