If people use modern methods of birth control , the world population will not rise so quickly 如果人們使用現(xiàn)代的節(jié)育方法,世界人口將不會(huì)如此迅速提高。
A program to regulate the number and spacing of children in a family through the practice of contraception or other methods of birth control 計(jì)劃生育:通過(guò)避孕或其它控制生育的方法來(lái)控制每個(gè)家庭孩子的數(shù)量和間隔的計(jì)劃。