最终，我们记住的不是敌人的话语，而是朋友的沉默。

人们不会问一个受苦的人：你的国家是什么？你的宗教是什么？人们只会说：你在受苦，这对我来说就足够了。

In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.

When you're depressed, It always helps to lean your head on your arm. Arms like to feel useful.