It is not the task of history to judge, but to understand.
剪辑的魔力在于镜头之间看不见的接缝。
教授数学是为了激励下一代的思考者和问题解决者。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.