The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

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。

化学的未来在于开发与自然合作而非对抗的可持续方法。

生活是一张白纸，每个人都在上面写上自己的一两句话。