A large and rapid drop in the world's birth rate has taken place during the past 10 years.
A large and rapid drop in the world's birth rate has taken place during the past 10 years.
世界人口的出生率在过去10年里发生大幅快速的下降。
A large and rapid drop in the world's birth rate has taken place during the past 10 years.
世界人口的出生率在过去10年里发生大幅快速的下降。