The more I live, the more I regret how little I know.

The man with a toothache thinks everyone happy whose teeth are sound. The poverty-stricken man makes the same mistake about the rich.

Well-being cannot exist just in your own head. Well-being is a combination of feeling good as well as actually having meaning, good relationships and accomplishment.

I write to make sense of the world.

The joy of chemistry is in seeing the invisible become visible.

煤炭开采的创新不仅仅是技术问题，更是思维方式的转变。