这就是人类第一个划时代的变革，人类建立了家庭，形成了某种形式的私有制，也给自己带来了无穷无尽的争吵和冲突。
We must remember that this is a very small star and probably some of the larger and the more important stars and may be very virtual and happy.
现实总是比小说更丰富、更复杂。