求翻译：在旅游资源开发中,便可采取旅游生态建设和污染治理的措施,使开发出来的旅游资源比原来的生态环境质量更高,即旅游开发美化了生态环境.旅游业还能保持生态环境.旅游资源开发出来进入利用阶段,若能科学地管理,能使当地生态环境进入良性循环.是什么意思？

In the development of tourism resources and tourism ecological construction and pollution control measures can be taken, makes development of tourism resources and ecological environment of higher quality than the original, that tourism ecological environment development and beautification. tourism can also maintain the ecological environment. tourism resources development entered the stage of use, if scientifically management, enables the local ecological environment into a virtuous circle.