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。
The role of the economist is part scientist, part engineer.
牺牲自由以换取安全（可指生活保障）的人，不配有自由和安全。
你容忍什么，就会得到什么。
我不完美，我也不假装完美。
The best way to predict the future is to create it.
The power of abstraction is that it allows us to ignore irrelevant details and focus on the essential aspects of a problem.