中国每一代，都有相当于美国规模的人口从农村涌入城市。

China every generation, there is equivalent to the size of the U. s. population from rural areas to cities.

youdao

中国每一代，都有相当于美国规模的人口从农村涌入城市。

China every generation, there is equivalent to the size of the U. s. population from rural areas to cities.

youdao