All men are created equal.

勇气不是没有恐惧，而是尽管恐惧仍选择行动。

Collaboration across borders and disciplines is essential for the advancement of the Internet.

Writers are the engineers of the soul.

Man barricades against himself.

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。