birth: n.1.出生,诞生;生产,分娩。2.出身,家系;血统;门第,家世。3.起源,开始。4.〔古语〕产物,产儿。短语和例子the date of one's birth 生日。 A still [difficult] birth 死[难]产。 Five young at a birth 一胎产五仔。 A person of birth [of no birth ] 出身高贵[卑微
If people use modern methods of birth control , the world population will not rise so quickly 如果人们使用现代的节育方法,世界人口将不会如此迅速提高。
2.
A program to regulate the number and spacing of children in a family through the practice of contraception or other methods of birth control 计划生育:通过避孕或其它控制生育的方法来控制每个家庭孩子的数量和间隔的计划。