With a shortage of chromosomes, a developing fetus will likely grow into a child with down syndrome.
如果缺省染色体,一个处于成长阶段的胚胎可能发育成一个具有不良综合症的小孩。
Though Mrs.Busssman fully acquainted with this story, she thought that there was a chance in a million that she might be right.
尽管巴斯曼夫人熟知这个情况,但她仍然认为自己的想法仍有百万分之一的可能性。