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 highest title which a man can write upon the page of history is his own name.

Collaboration across industries is key to solving the world's most pressing challenges.

不重視自己的人，也無法重視任何事物或任何人。

The only way to learn mathematics is to do mathematics.

使生活成為可能的唯一事情是永久的、無法忍受的不確定性；不知道接下來會發生什么。