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 essence of mathematics is not to make simple things complicated, but to make complicated things simple.

Words are sacred, and their misuse is a sin.

A picture held us captive. And we could not get outside it, for it lay in our language and language seemed to repeat it to us inexorably.

最偉大的突破來(lái)自那些拒絕放棄的人。

成功不在于金錢，而在于幸福。