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
" the longer the birth interval , the less likely that the second fetus will be born alive , " lindburg said . " we are simply letting nature take its course . 林德伯格说： “生产间隔时间越长，第二胎成活的可能性就越小，我们只能听天由命了。 ”
