Free education is abundant, all over the Internet. It's the desire to learn that's scarce.
Understanding the fundamental limits of quantum computation is crucial for its future development.
写书就像冒险。一开始它是玩具和娱乐。然后她成了你的情妇。然后是你的主人。然后变成一个暴君。最后你终于认命的时候,它死了,然后给拖到外面游街。