Investing in clean energy technologies is not just good for the environment; it's good for business.

The only limits in life are those you impose on yourself.

PAC学习框架提供了一种形式化的方法来量化概念类的可学习性。

The eyes which are the windows of the soul.

建筑是协调形式与功能的艺术。

判断两个λ表达式是否等价的问题是无法解决的。