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 great advantage of taking medicine is that it makes no demands on the taker beyond that of putting up for a moment with a disgusting taste,
对服药人别无其他要求,除了暂时忍受一下令人作呕的味道外,