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

藝術的未來在于它變得不可見的能力。

Every artist dips his brush in his own soul, and paints his own nature into his pictures.

計算機科學中數學的美在于它能夠用抽象概念建模和解決現實世界的問題。