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 Langlands program is not a theory but a web of conjectures and theorems that, if fully established, would unite number theory and representation theory.

Sustainability isn't a choice—it's our responsibility to future generations.

氣候變化是農業面臨的最大挑戰，但也是其重塑的最大機遇。

通過不屬于我們的模式來解釋我們的現實，只會讓我們越來越陌生，越來越不自由，越來越孤獨。

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."