The move to replacement-level fertility is one of the most dramatic social changes in history.

人口趋向生育等值替换水平是历史最有戏剧性的社会变化。

youdao

The move to replacement-level fertility is one of the most dramatic social changes in history.

人口趋向生育等值替换水平是历史最有戏剧性的社会变化。

youdao