可能近似正确（PAC）学习的概念在计算学习理论中具有基础性意义。

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 more time I spent on maths, the more excited I got.

我不想被视为“童星”。我想被视为一个恰好有过童年的演员。