marital fertility rate

例句：

1. 1.The marital fertility rate is a key indicator of a country's economic health.
   婚姻生育率是衡量一个国家经济健康状况的关键指标。
2. 2. The government has released data on the marital fertility rate for the past year.
   政府发布了过去一年婚姻生育率的数据。
3. 3. The marital fertility rate has been declining in recent years, indicating a trend towards delayed childbearing.
   近年来，婚姻生育率一直在下降，表明人们倾向于推迟生育。