betterment of land

例句：

1. 1. The government is committed to bettering the lives of its citizens.
   政府致力于改善公民的生活。
2. 2. The company has made significant improvements in its product quality.
   该公司在产品质量上取得了显著改进。
3. 3. The teacher's efforts have helped improve the students' academic performance.
   老师的辛勤工作已经帮助提高了学生的学业成绩。