两天以后，他们把受精卵重新植入了我的体内。Two days later, they implanted the fertilized eggs back inside me.当受精卵植入子宫壁时，妊娠就开始了。Pregnancy begins when the fertilized egg is implanted in the wall of the uterus.非同卵双生子是两个受精卵同时在子宫内着床的结果。Non-identic...
He argues strongly for retention of NATO as a guarantee of peace.他强烈要求保留北大西洋公约组织以维护和平。The company needs to improve its training and retention of staff.公司需要改进对员工的培训和留用工作。They advocate the retention of our nuclear power pl...
He hunted vainly through his pockets for a piece of paper.他翻遍口袋想找一张纸，结果没找到。The criminals vainly sought concealment from the searchlight.罪犯们徒劳地躲闪着探照灯光。He shouted after them, vainly trying to attract their attention.他在他们的后...