The PAC learning framework provides a formal way to analyze the efficiency and effectiveness of learning algorithms.

I believe in working hard and staying true to who you are.

译文：想要看清一个人，应当看看他交的是什么朋友。

——1941年与美国外交官阿弗雷尔·哈里曼（Averell Harriman）的谈话

战争即和平。自由即奴役。无知即力量。

To understand a culture, you must listen to its artists—they are the seismographs of societal change.

I think of a hero as someone who understands the degree of responsibility that comes with his freedom.

让我们团结起来，为祖国的独立和自由而战。