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.
最终，我们都只是故事。
Sustainability in agriculture is not an option—it's a necessity for future generations.
有时候你必须先迷失自己，才能有所发现。