area method

例句：

1. 1. The city covers an area of about 50 square kilometers.
   这个城市覆盖了大约50平方公里的区域。
2. 2.The government has been working to improve the quality of life in this area.
   政府一直在努力改善这个地区的生活质量。
3. 3. The research team is studying the effects of pollution on the environment in different areas.
   研究小组正在研究污染对不同地区环境的影响。