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。
The student did in an archway nearby where he could watch and hear everything that went on.
那个学生躲在附近一拱形的门廊里,在那儿可以看见、听到现场发生的一切。