being in such a position that top and bottom are reversed;
"a quotation mark is sometimes called an inverted comma" "an upside-down cake"
例句
用作形容词(adj.)
The El Nino phenomenon that brews up in the southern Pacific every three to five years is showing signs of turning the world's weather upside down again.每隔三五年在南太平洋形成的埃尔尼诺现象正显示出又一次要把世界气候颠倒的迹象。
In other words the whole spectrum of levels is just like that of an alkali turned upside down.换句话说，整个能级谱恰好就像是上下颠倒的碱金属能级谱一样。
Everything is upside down in this house.这房间什么都搞得乱七八糟的。
A small man of about thirty, with green eyes and a tangle of fair hair, stood looking down at me.我面前站着一个三十岁上下的矮小的汉子，碧绿的眼睛，一头乱七八糟的淡黄头发，他正低头望着我。
