environmental data base guides

例句：

1. 1. The city is surrounded by a beautifulpark and a green environment.
   这个城市被一个美丽的公园和绿色的环境所包围。
2. 2.The research focused on the impact of environmentalfactors on human health.
   该研究专注于环境因素对人类健康的影响。
3. 3. The company has beenworking to improve its environmental performance.
   该公司一直在努力提高其环境表现。