如何使用 "sterile" 造句

1. Scientists used to think breast milk was sterile , like urine .
科学家们过去常常认为母乳是无菌的,就像尿液一样。
2. Her husband had contracted venereal disease before their marriage , ms. pakula writes , and was probably sterile .
pakula女士称,她的丈夫在他们婚前就感染了性病,可能导致不育。
3. History is a sterile earth where heather does not grow .
历史是一块贫瘠的土地,生长不出欧石南。
4. The uterus is a sterile environment .
子宫是个无菌的环境。
5. The plant has to buy a huge number of eggs and make sure they 're all sterile .
工厂不得不购买大量的鸡蛋,并且要保证这些鸡蛋是无菌的。