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 wise man learns more from his enemies than the fool from his friends."

Respect your efforts, respect yourself. Self-respect leads to self-discipline. When you have both firmly under your belt, that's real power.

Life is too short to be living somebody else’s dream.

歷史教育我們，你現在相信的假定在 100 年后很可能會被證明是錯的。一個在今天就可以問自己的好問題就是「我可能錯在哪里了？」

數學的美在于它讓我們以一種既精確又深刻的方式看待世界，揭示支配萬物的潛在秩序。