小规模养殖户是这个行业的支柱，他们的知识是无价的。

Physics is not just about solving problems, it's about understanding the nature of reality.

Accountability is non-negotiable—every company must be transparent in its environmental impact.

Natural experiments are a powerful tool for understanding causal relationships in the real world.

他说世界是为人们战斗而创造的，事物的价值在于为之战斗的价值。