科学的历史是人类纠正错误的历史。
The history of science is the history of men correcting their mistakes.
Careers are a jungle gym, not a ladder.
Coal is not just a commodity, it's a commitment to America's future.
Happiness is not the belief that we don't need to change; it is the realization that we can.
译文：农民眼泪像雨一样流，又能怎样呢?当官的应该体恤百姓的辛苦啊!
Light is the most important material in architecture.