recurernce rate

例句：

1. 1. Thecompany's return rate has increased significantlysince the new policy was implemented.
   自从实施了新政策后，公司的回返率显著提高。
2. 2. The population growth rate isa key indicator of a country'seconomic health.
   人口增长率是衡量一个国家经济健康状况的关键指标。
3. 3. The research team found thatthe recurrence rate of this diseasein their region was higher than expected.
   研究团队发现，该地区这种疾病的复发率高于预期。