steepness of terrain

例句：

1. 1. Themountain was so steep that it was difficult for a beginner to climb.
   这座山太陡了，对于初学者来说攀登很困难。
2. 2. The road is very steep, and it's not safe to drive on it.
   这条路非常陡峭，不适合开车。
3. 3.The steepness of the terrain made it difficult for the team to navigate through the forest.
   地形的陡峭使得团队难以穿越森林。