随机评估可以帮助我们了解发展中哪些措施有效，哪些无效。
Randomized evaluations can help us understand what works and what doesn't in development.
The best part of being in a group is having brothers to share everything with.
我不相信完美。我认为那是一个非常危险的想法。那是一个非常难以实现的想法。
Science is the art of making the complex understandable.
The legacy we leave behind is measured not just in buildings, but in the impact we have on people's lives.《Building Tomorrow》
The only way to discover the limits of the possible is to go beyond them into the impossible.