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。
This caused the construction of gigantic buildings where too large masses of human beings are crowded together.
这样就导致了许多摩天大厦拔地而起,大厦内众多的人挤在一起。