比率反映就业人口需要抚养的小童和幼儿，一般受出生率影响。

The ratio is a measure of the number of young people who are fed by the working population. This is affected by factors like birth rate.

youdao

比率反映就业人口需要抚养的小童和幼儿，一般受出生率影响。

The ratio is a measure of the number of young people who are fed by the working population. This is affected by factors like birth rate.

youdao