色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

"The challenge in theoretical computer science is not just to solve problems, but to understand why they are hard to solve."

You have to be able to admit when you’re wrong and get out of a losing position quickly. The worst thing you can do is hold onto a losing trade hoping it will come back.

The Langlands program is not just a collection of conjectures but a way of thinking about mathematics.

生命的價值不在于我們呼吸的次數，而在于那些讓我們屏息的時刻。