今天到usaco上做题，
看到了Listen to this amusing MP3 file that explains it all for computer geeks.
记起以前在matrix67看到过
看了matrix67博客, 才搞懂
下载下来一听十分有趣

那段对话:
Doctor: “It’s worse than I feared.”
Mother: “What is it?”
Doctor: “I’m afraid your son has … the Knack.”
Mother: “The knack?”
Doctor: “The Knack. It’s a rare condition characterized by an extreme intuition about all things mechanical and electrical … and utter social ineptitude.”
Mother: “Can he lead a normal life?”
Doctor: “No. He’ll be an engineer.”
Mother: “Oh, no! [crying]”
Doctor: “There, there. Don’t blame yourself.”