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

There is something profoundly mysterious about quantum mechanics that we still don't understand.

可持續性不僅僅是一個目標，更是我們對未來肩負的責任。

Humor is just another defense against the universe.

"The act of reading is an act of empathy, of seeing the world through someone else's eyes."

世上所有的雞蛋去碰石頭，石頭也會依然如故，不會被毀壞。