Time travel is the most frustrating thing in the world. You can't change anything, and you can't stop anything from happening.
I think it's rarely about what you actually learn in class—it's mostly about what questions you ask yourself.
迄今为止发现的让许多人自愿合作的唯一方式是通过自由市场。
分布式系统是指一个你甚至不知道存在的计算机的故障可能导致你自己的计算机无法使用。