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

一本書就是你手中握著的夢想。

用黃金打造的船不能在波濤洶涌的江面上航行，用玉雕琢的馬不能馳騁在千里路途上。

The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle.

Quantum cryptography doesn't rely on the difficulty of mathematical problems, but on the fundamental laws of physics.

一本好的圖畫書應該是文字和圖像的合作，彼此相互增強。