体外受精的研究发展the development of in vitro fertilization胚胎的性别早在受精时就决定了。The sex of the embryo is predetermined at fertilization.专业医疗机构答复说受精以后的发育是连续的。The medical professional bodies reply that development from fertilisation onwa...
Air can be pumped into the diving suit to increase buoyancy.可以给潜水衣充气以增大浮力。She was released from hospital yesterday after having her stomach pumped.洗胃之后，她昨天出了院。Teenage disco music pumped out at every station.每一站都喧闹地播放着十几岁...