苏联是一个恐惧的文明，人们生活在持续的对夜间敲门声的恐惧中。
The Soviet Union was a civilization of fear, where people lived in constant dread of the knock on the door at night.
A person's a person, no matter how small.
The best way to learn AI is to do AI.
DNA是用生命语言写就的终极史书。