Randomized evaluations can help us understand what works and what doesn't in development.

释义：打仗时所谓的“奇招”就是攻击敌人没有准备的位置，在敌人没有预料到的时候采取行动。利用敌人的疏忽和意外来达到制胜的效果。

The elements of consciousness are the ultimate data of psychology.

My idea of heaven is a great big baked potato and someone to share it with.

I know that the appearance of Los Angeles at four o 'clock in the morning every day.

我试图聆听场地在说什么。我不会把我的意志强加于它。