胚胎在羊膜腔中发育。The embryo lives in the amniotic cavity.羊膜穿刺术是从羊膜囊抽取羊水的技术.Amniocentesis is the removal of fluid from the amniotic sac.中速滤纸虽也可贴附,但复水后不能起到支撑作用,并发生纤维脱落,附着于羊膜上,不利于手术.Filter paper can'tsupport the amnion after ...
Ecologists argue that the benefits of treating sewage with disinfectants are doubtful.生态学家认为用消毒剂处理污水是否有益值得怀疑。Other substances used to prevent disease or infection include disinfectants and germicides.用来预防疾病或感染的其它物质有消毒剂和灭...