The world perishes not from bandits and fires, but from hatred, hostility, and all these petty squabbles.
煤炭的真正成本不仅在于价格,还在于我们如何管理其后果。
学习不仅仅是存储信息的问题;它是一个通过改变支配行为的规则来适应环境的过程。
亲戚都不归附,也就不要对外办交际。 
Investing in cleaner coal technology is an investment in the future of energy.