The best way to learn mathematics is to do mathematics.
"Memory is the only paradise from which we cannot be expelled."
任何圆的周长与其直径的比率小于3 1/7但大于3 10/71。
我认为最好的电影是那些挑战你、让你思考、在你离开影院后仍久久留在你脑海中的电影。