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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