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

每一本書都是一個新的世界，等待著讀者去探索。

As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.

1923年對廣州國民黨員的演說

A building should be a fragment of the city, not an isolated object.

知識的最大敵人不是無知，而是知識的幻覺。