Every lump of coal we mine keeps the lights on in someone's home.

The future of energy lies in balancing economic growth with environmental stewardship.

To be a writer is to sit down at one's desk in the chill portion of every day, and to write; not waiting for the little jet of the blue flame of genius to start from the breastbone.

关于教育的斗争不仅仅是经济和政治问题，还涉及民主的本质和未来的意义。

机械的完美在于以最小的摩擦和浪费产生预期的效果。

秋天的小提琴悠长的啜泣，用单调的忧郁刺伤我的心。