At last, some factors affecting the life cycle of Karst-cave tourist areas were analyzed, and some Suggestions about the development and management of Karst-cave tourist areas were put forward.
最后，分析了影响溶洞型旅游地生命周期的因素，并提出了溶洞型旅游地开发、经营的若干相关建议。
2
Based on the chemical kinetic theory and method, the carbon cycle in the karst system of the Jinan spring field is discussed in the paper.
本文采用化学动力学的基本原理和方法，对济南泉域岩溶系统碳循环进行研究。
3
Karst water in the strong runoff zone takes an active part in the modern water cycle, with an average residence time of 51 years, and so has a relatively strong renewable capacity.