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

I don’t chase success, I chase excellence.

Never let your sense of morals prevent you from doing what is right.

The beauty of mathematics only shows itself to more patient followers.

You are not only responsible for what you say, but also for what you do not say.

想象力是一塊肌肉。如果你不使用它，它就會萎縮。