现代采石要求我们同时成为地质学家、生态学家和社区外交官。

I have so much admiration for women who are married with children and work. I don’t know how you all do it.

人类能犯的最大错误是畏惧犯错误。

The greatest weapon against stress is our ability to choose one thought over another.

对任何思考者来说，最大的挑战是以一种允许解决的方式表述问题。