制革厂的废物流比任何使命宣言都更清晰地讲述其道德故事。
3、如果相爱,那是无限的。
"Words are the only things that last forever; everything else perishes."
The true test of a mathematical idea is its ability to inspire further questions.
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change.