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

Mathematics is a living subject, constantly evolving with new ideas and discoveries.

不被嘲笑的夢(mèng)想，是不值得去實(shí)現(xiàn)的。

"Writing is a way to explore the complexities of human relationships."

Surround yourself with people who challenge you, not just agree with you.

An appeaser is one who feeds a crocodile - hoping it will eat him last

語(yǔ)言是存在的家。