https://online2.tingclass.net/lesson/shi0529/0009/9907/331.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
up in the air 拿不準，沒有決定，懸而未決
His new job is still up in the air.
他的新工作還沒有著落呢。
I don't know what to do. Everything is up in the air.
我不知道做什么，一切都還是未知數(shù)。
瘋狂練習(xí)吧!
