Directors' salaries vary widely according to how many jobs they get each year and how successful their work is.
2
但这真的是第一次吗?克隆与改造胚胎的基因以消除象囊性纤维变性这样的基因疾病真的是有天壤之别吗?
But is it really the first time? Is cloning all that different from genetical ly engineering an embryo to eliminate a genetic disease like cystic fibrosis?