I'm not a celebrity, I'm a creative.
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。
实现明天的唯一限制是我们今天的疑虑。
The only thing necessary for the triumph of evil is for good men to do nothing.
The Langlands program is a framework for understanding the unity of mathematics.
"The way you think about time changes as you get older."