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 ultimate situations - death, chance, guilt, and the uncertainty of the world - confront man with the reality of his existence.

數學的快樂來自創造的行為，而不僅僅是結果。

It’s on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.

The true end of satire is the amendment of vices by correction.

代數群的算術是理解朗蘭茲猜想的關鍵。

I’m chasing perfection.

商業的成功不僅僅是利潤，而是為所有利益相關者創造價值。