圆的周长大于任何内接等边多边形的周长，小于任何外切多边形的周长。
The most dangerous phrase in aquaculture is: "This is how we've always done it."
"Every book has a soul. The soul of the person who wrote it and of those who read it and dream about it."
The world is full of magic things, patiently waiting for our senses to grow sharper.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
我不想成为明星，我想成为一个人。
The unexamined life is not worth living.
Abstraction is not just about hiding details; it's about creating a clear and concise model of the problem domain.
你的态度，而不是你的能力，将决定你的高度。