网友回答：
so the one-child policy was necessay. in america， now there were 3 billion. some day they will have the same amount people as we had in china，
温馨提醒：随时光变迁，文中所陈述观点；准确性、难免有所变动，因此文中观点仅供参考。
so the one-child policy was necessay. in america， now there were 3 billion. some day they will have the same amount people as we had in china，
