intrinsic rate of natural increase

例句：

1. 1. The intrinsic rate of naturalincrease is a critical factor in determining thepopulation growth.
   内在增长率是决定人口增长的关键因素。
2. 2. The government has been working toimprove the intrinsic rate of natural increase.
   政府一直在努力提高自然增长率。
3. 3. Theintrinsic rate of natural increaseis influenced by many factors,including genetics and environment.
   自然增长率受到许多因素的影响，包括遗传和环境。