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 gaoler looked on eagerly, anxious to see if his fellow actor had at last learnt his lines.
狱卒热切地观察着,急于想了解他的同事是否记熟了台词。