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

"Books are the bridges that connect us to each other."

農業的真正進步意味著讓土地比我們發現時更好。

The wise draw inspiration from the order of the natural world to guide their individual lives.

Knowledge has value only insofar as it contributes to the liberation of humanity.

真正的旅程不在于發現新的風景，而在于用新的眼光去看。