monoclinal valley

例句：

1. 1. The monocline is the main geological feature of this region.
   单斜是该地区的主要地质特征。
2. 2. The monoclinal valley is a popular hiking trail in the mountains.
   单斜谷是山区一条受欢迎的徒步小径。
3. 3. The monoclinal valley is formed by the convergence of two tectonic plates.
   单斜谷是由两个构造板块的汇聚形成的。