From beginning to end his conduct had been despicable and wicked.从头到尾他的行为既卑鄙又可恶.The principle had been pernicious from beginning to end.这条原则自始至终都是有害的.I want to know about this thing now from beginning to end.现在我要知道此事的始终....
Once the ovum is released it has a lifespan of 12 to 36 hours.卵子排出后可存活12至36小时。By day 11 the ovum begins to attach and implant in the lining of the uterus.到第11天卵子着床嵌入子宫内壁.One way is taking the cell from a fertilized ovum....