ovum的例句（ovum在句子中的用法）

• an immature ovum 未成熟的卵细胞
• One way is taking the cell from a fertilized ovum. 一种方法是从受精卵中取出细胞.
• 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.
• 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。