发展经济学最终是为了改善人们的生活。
Development economics is ultimately about improving people's lives.
Sometimes, the hardest part of solving a case is facing the truth.
世界充满了混乱，但在那混乱之中，有美存在。
A man's errors are his portals of discovery.
最好的农民不仅仅是饲养动物，他们是在培育生态系统。