自然实验可以为经济问题提供有价值的见解。
Natural experiments can provide valuable insights into economic questions.
The poet is the man who translates the emotions of others into words.
The world is a mirror, reflecting our deepest fears and desires.
世界上充满了故事，但所有的故事其实是一个。
人比自己想象的更能影响他人。
科学不仅仅是寻找答案，更是提出正确的问题。
