组合数学是不用计数的计数艺术。
数学的本质在于它的自由。
一个运动员,为了能在百米比赛上场,至少要练上一万英里。数量带来经验。
We have not yet learned to think, but we are learning.
"In the silence of the night, the stories we tell ourselves become the truths we live by."