英语翻译论旅游开发开发与环境保护的辨证关系对生态旅游的可持续发展与社会功效研究

论旅游开发与环境保护的辨证关系
Discussion on the differential relationship between development of tour and environment protection.
对生态旅游的可持续发展与社会功效研究
Research on sustainable development of ecological tour and its social functions.