網友回答：
has kept the policy “one couple，it is reported that the world’s population was 6 billion in the year 2， more and more people losing their jobs and so on. these problems are mainly in the developing countries because the population of the developing count
溫馨提醒：隨時光變遷，文中所陳述觀點；準確性、難免有所變動，因此文中觀點僅供參考。
