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

最簡單的詞語往往承載最重的分量。

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

"The freedom to be yourself is a gift only you can give yourself. But once you do, no one can take it away."

追求數(shù)學真理就是追求美、優(yōu)雅和簡潔。

【譯文】 孔子說：“理想無法實現(xiàn)了，我準備乘筏漂到海上。會跟我走的，只有子路吧？”