planation 的定义
Geology.
- the process whereby an irregular land surface is made flat or level by erosion.
更多planation例句
- These changes probably included stream capture, flooding, drought, uplifting and planation.
- The planation and striation of a stone need not be confined to its under surface.
- He may have been misled by other ministers, and for his benefit I make this ex- planation.