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 definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

最好的設計是功能與美學的結合。

"Escribir es una forma de hablar sin ser interrumpido."

Truth is so hard to tell， it sometimes needs fiction to make it plausible.

Our strength comes from our ability to adapt and evolve.

A book is not just pages and ink; it is a living breath.

大海是一個既危險又美麗的地方，提醒我們生命的脆弱。

Simplicity is not the goal. It is the by-product of a good idea.