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。
力的统一不仅是数学上的梦想，更是物理上的必然。
When someone tells you something is wrong， they’re usually right. When someone tells you how to fix it， they’re usually wrong.
世界是一台机器，而我们是它的故障零件。
We may encounter many defeats but we must not be defeated.
最好的数学不仅仅是逻辑的——它是直观且美丽的。
There is no escape from the labyrinth of existence.
科学与日常生活不能也不应该被分开。