"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

The true cost of coal must account for both its immediate value and its long-term impact on communities and ecosystems.

流放不是一个地方，而是一种你随身携带的心态。

实证研究中最重要的是要清楚你想要回答的问题。