Efficiency without ethics is just speed in the wrong direction.

函数的概念在数学中是基础的，而λ演算提供了一种形式化这一概念的方法。

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

I don't need anyone to hold my hand.

在冬天的深处，我发现我内心有一个不可战胜的夏天。