1. The upside of a coin usually has a head on it.
    硬币正面常有个头像。

2. ´It´s all right,´ she said, ´but isn´t it upside down?´
    "还可以吧。"她说，"不过，是不是挂倒了？"

3. You´ve got the picture upside-down, you dope!
    你把画挂倒了, 你这笨蛋!

4. It is a strange thought, but I believe a correct one, that twenty or thirty pages of ideas and information would be capable of turning the present-day world upside down, or even destroying it.
    这是个离奇的想法。不过我认为这个想法是正确的。