When cave, as a kind of natural geomorphologiclandscape, is developed and utilized by human being as a kind of tourism resource, we call it tourism cave.
洞穴作为一种自然地貌景观被人们开发利用而成为一种旅游资源时，我们就称之为旅游洞穴。
2
In addition to the petroleum geologic conditions, the main causes are also related with the properties of near surface sediments and the geographical and geomorphologiclandscape conditions.
其主要原因除与油气地质条件相关外，还取决于近地表沉积物的性质，以及地理、地貌的景观条件。
3
The quantitative research of geomorphologic evolution in bedrock channel fluvial landscape plays a significant role in the discussion of the relationship among tectonics, climate, and surface process.