Randomized evaluations can help us understand what works and what doesn't in development.
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。
声音是每个人都拥有的乐器。
性格软弱,至多只能做到不犯罪恶,如果还要侈谈高尚的美德,那就是狂妄和大胆了。
"Science is the art of understanding the universe's language."