由于技术和社会允许采用高度有效和普遍可接受的计划生育方法，因此家庭规模有所减少。
As technology and society permit highly effective and generally acceptable methods of family planning there has been a decline in family size.
由于技术和社会允许采用高度有效和普遍可接受的计划生育方法，因此家庭规模有所减少。
As technology and society permit highly effective and generally acceptable methods of family planning there has been a decline in family size.
应用推荐