The work on IVF was driven by the desire to help infertile couples.
历史学家行走在事实与想象的钢丝上。
It took untold generations to get you where you are. A little gratitude might be in order. If you're going to insist on bending the world to your way, you better have your reasons.
广东话谚语
跨部门合作是解决林业最大挑战的唯一途径。