中国正在从事开发西部的宏伟计划.[work on}森林对阻止空气污染起着重要的作用.{play a role in }
热心网友
China is working on its great plan to develop the west.Forests play a role in the prevention of air pollution.
热心网友
森林对阻止空气污染起着重要的作用Forests play an important role in in preventing air pollution.