数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
最终,我们都是孤独的,我们必须独自面对我们行为的后果。
The best time to plant a tree was twenty years ago. The second best time is now.
We live in a beautiful world.