ecological environment

例句：

1. 1. The ecological environment of the city isbecoming increasingly polluted.
   这个城市的生态环境正在变得越来越污染。
2. 2. The government has been working hardto protect the ecological environment.
   政府一直在努力保护生态环境。
3. 3. The study of ecology helpsus understand how ecosystems work and howthey can be preserved.
   生态学的研究帮助我们理解生态系统是如何工作的以及如何可以保持它们。