PAC学习框架提供了一种正式的方法来分析学习算法的效率和有效性。

音乐可以治愈心灵，我希望我的歌可以帮助人。

There is no greater sorrow than to recall happiness in times of misery.

态度上的弱点会变成性格上的弱点。

A rich man's body is like a premium cotton pillow, white and soft and blank. Ours are different. My father's spine was a knotted rope, and the skin on his chest was so thin that you could see the ribs pressing out against it.

语言的艺术就是生活的艺术。