煤炭的真实成本必须既考虑其即时价值，也考虑其对社区和生态系统的长期影响。
The true cost of coal must account for both its immediate value and its long-term impact on communities and ecosystems.
Simple living, high thinking: this is the path to real happiness.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
生物学将把人类的每一个基因与其他动物和细菌的基因联系起来，形成这个伟大的生命链。