美国俚语:up in the air 悬而未决

大家看过乔治克鲁尼主演的电影Up in the Air吗？你对up in the air的意思是怎样理解的？在俚语词典中，up in the air的解释如下：not decided or completely developed， undecided/uncertain about someone or something.  中文意思就是“悬而未决，未定，尚无定论。”.例句：

We have no idea which school she'll be attending in September - everything is still up in the air.  我们不知道她在9月会去哪所学校，还没定下来呢。

Let's leave this question up in the air until next week. 我们下周再解决这个问题吧。