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。
He's awful!He telephoned me four times Yesterday, and three times the day before yesterday.
他讨厌透了!他昨天给我打了4次电话,前天打了3次。