一个社会的人口增加率越接近零，其人口便愈老龄化。

The closer a society's population growth rate gets to zero, the more population aging it will be.

youdao

一个社会的人口增加率越接近零，其人口便愈老龄化。

The closer a society's population growth rate gets to zero, the more population aging it will be.

youdao