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

It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.

The most exciting moments in mathematics are when you see connections between things that seemed unrelated before.

The difference between animals and humans is that humans are capable of reasoning， but even that is unreliable.

藝術不是關于好品味，而是關于真相。