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.
艺术是不出门就能逃离的唯一方式。
我们没有什么可失去的,这是一种非常自由的感觉。
物资用完了才知道不足,是因为不懂得计量;事情做完了才知道有余,是因为不懂得调节。
Jealousy is not a pathology; it's an evolved defense mechanism against threats to reproductive success.