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

數學不僅僅是關于數字、方程、計算或算法：它是關于理解的。

The web does not just connect machines, it connects people.

If a man will begin with certainties， he shall end in doubts； but if he will be content to begin with doubts， he shall end in certainties.

"We are all born mad. Some remain so."

Art is the closest thing we have to magic.

能改過自新，天地都會轉怒為喜；能安分守己，鬼神也是無可奈何。