normal cycle of erosion

The theories of erosion cycles and physiographic stages are important theories of geomorphology.

侵蚀循环理论和地文期理论是地貌学的重要的基本理论。

The theory of erosion cycle and peneplain put forward by W.

台维斯的侵蚀循环与准平原的理论是 １００ 年来影响地貌学最深刻的一种学说。