动态规划理论基于最优性原理，该原理指出，无论初始状态和初始决策如何，剩余决策必须构成关于第一个决策所导致状态的最优策略。

Success comes from taking calculated risks, not reckless ones.

I tell you that virtue is not given by money，but that from virtue comes money.

Don't interfere with anything in the Constitution. That must be maintained, for it is the only safeguard of our liberties. And not to Democrats alone do I make this appeal, but to all who love these great and true principles.

The great challenge of the modern world is to create institutions that are strong enough to govern effectively but also accountable and responsive to the needs of citizens.

True leadership is about serving others, not commanding them.

译文：凶恶之人会令其他人害怕，可上天不会惧怕，良善之人会被其他人欺负，但上天不会欺负。赏析：人的善恶，上天会明察秋毫，也自有报应。那些蛮横霸道之人，总会有人收拾他，而那些善良的人，自会有余福。

I don't think you can ever stop learning as an actor.