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

I tend to think that the longer you look at a thing, the more abstract it becomes, and, ironically, the more real.

The most exciting moments in mathematics are when you realize that two seemingly unrelated areas are deeply connected.

拉丁美洲是烏托邦與懷舊的大陸。

生活不是等待暴風雨過去，而是學會在雨中跳舞。