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。
Don't worry! We won't leave before nine. We'll wait for you outside the school gate!
别担心!9:00前我们不会出发。我们将在学校的大门外等你!