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 leaders are those who empower others to lead.
Every tree we plant today is a legacy for generations to come.
定价的艺术不在于设定价格，而在于设计揭示真实价值的过程。
The pursuit of knowledge in computer science is a journey through the landscape of logic and creativity.
科学不是形式逻辑；它和其他创造性艺术一样，需要思想的自由发挥。
Diversity in tree species isn't just ecology—it's risk management for our planet's lungs.
Innovation in coal mining isn't just about extraction—it's about doing it smarter, safer, and with greater respect for the environment.
I think I'm afraid to be happy...because whenever I get too happy, something bad always happens.
我们都被过去的幽灵所困扰。