The world needs reliable energy, and coal still plays a critical role in providing it.
学者学习古人，开始时接触到的是粗浅的内容，中期接触到精华，最终领悟到其神妙变化。
技术必须同时服务于行业和环境，别无他法。
生活的艺术在于克服困难而不战胜它们。
A coragem não é a ausência do medo, mas a vitória sobre ele.
I like to be a free spirit. Some don’t like that, but that’s the way I am.
A ship in port is safe, but that's not what ships are built for.