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

Knowledge is represented in the mind as symbolic structures.

人類的狀況是不斷的斗爭，但也是無盡的可能性。

對知識的追求是無止境的，而這正是它令人興奮的地方。

I'm not a girl who gives up. I'm a girl who fights.

The key to success in research is to focus on fundamental problems that have long-term impact.

Of all the things which wisdom provides to make us entirely happy, much the greatest is the possession of friendship.

經濟發展理論研究的是經濟系統如何產生不斷改變它的力量。