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

To solve a mathematical problem is to uncover a piece of the universal puzzle.

沉默是最強(qiáng)大的回答。

"In the end, we are all alone, and that is the ultimate truth of existence."

The young do not know enough to be prudent, and therefore they attempt the impossible – and achieve it, generation after generation.

你看不見真正的你，而你所見的只是你的影子。