出自汉·桓宽《盐铁论·地广》。释义：要发财致富就不能太过仁慈，如果太过仁慈也就不能发财致富。

"The most sustainable competitive advantage is learning faster than your competition."

You have to believe in yourself when no one else does – that makes you a winner right there.

煤炭造就了现代世界，我们有责任确保以智慧管理它的遗产。

可持续性不是牺牲，而是机遇。

一个好的数学家总是准备好进行概括。