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 telephone rings and this marks the prelude to an unforeseen series of catastrophes.
这时电话铃响了。它预示着一连串意想不到的灾难的来临。