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。
Because Manhattan Island is made of solid rock, it is safe to build very tall buildings.
曼合顿岛是由坚固的岩石构成的,这使得兴建大厦非常安全。