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 hawk was everything I wanted to be: solitary, self-possessed, free from grief, and numb to the hurts of human life."

形式化方法的美在于它們能夠提供關于系統正確性的絕對確定性。

如果技術不能賦能于人，它就毫無意義。

Combinatorics is the art of counting without counting.

記著時間就是金錢。