up in the air

含义

still uncertain because nothing has been decided

尚未决定，仍不确定.

例句

1. 1Our summer plans are up in the air until my sister confirms her wedding date.
2. 2After the budget cuts, nobody knows if the new library will open; it's all up in the air.
3. 3Nobody has decided who will run the shop next year, so everything is up in the air.
4. 4The date of the concert is still up in the air because the band hasn't confirmed yet.
5. 5Is the office move still up in the air, or have the directors finally chosen a building?

语法

通常用在 be、remain 或 leave 之后。主语是计划或问题，而不是人。

意思相近