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

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

小步快跑，快速迭代。

The worse a situation becomes, the less it takes to turn it around, the bigger the upside.

未經(jīng)反思的人生是半生，而傳記就是那面鏡子。