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

A good building is like a good friend - it gets better with time.

理論地理學是科學的女王，因為它獨力處理事物在空間中的排列。

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

數學的目標不是解決問題，而是理解問題。