数学不是关于数字、方程、计算或算法的：它是关于理解的。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?
I don’t believe in failure because I don’t believe in giving up.
The study of automata and formal languages is fundamental to understanding the limits of computation.
人类学的目的是让世界能够包容人类的差异。
Illustrations should not just decorate the text; they should expand it.
市场是人类创造物，和所有人类创造物一样，它们可以被改进。