"I’m not perfect. I make mistakes like everyone else."

我们是我们的过去。

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

江河的水之所以浩浩荡荡，并非只由一个源头流出来；无比珍贵的皮衣，并非只由一只狐狸腋下的毛皮所能制成。