试管婴儿的研究是出于帮助不孕夫妇的愿望。
The work on IVF was driven by the desire to help infertile couples.
"A story can change the world, one reader at a time."
Drawing makes you see things clearer, and clearer and clearer.
当一个人不能再拥有的时候，他唯一能做的便是不要忘记。