Adverb:

1. in an inverted manner;

   "the box was lying on the floor upside down"
   

inverseadj.倒转的；相反的n.倒数；相反的事物；(数学)逆反函数；负数

overprep.在 ... 的上方；遍及地；在 ... 期间adv.穿过；完全覆盖；结束；落下n.(板球中)每个投球手一次连续所投出的球数

1. The plane was flying upside down at high speed.
   飞机正高速上下颠倒飞行。
2. Leibnitz came along and turned Newton's definition upside down.
   莱布尼茨把牛顿的定义颠倒了过来。
3. Everything in the room was turned upside down.
   室内的一切都被搞得乱七八糟。