Our travel plans are still up in the air.

我们的旅行计划尚未决定。

《牛津词典》

Probably. It's still up in the air.

大概吧。但还不确定。

youdao

The question is still up in the air.

这个问题还没定下来。

youdao

But Steven Slater is in a lot of legal trouble and details of exactly what happened on that JetBlue flight and how he acted are still up in the air.

VOA: special.2010.08.13

The Paris Air Show ends Sunday which still gives Boeing time to catch up to rival Airbus in securing new aircraft orders.

VOA: standard.2009.06.16

"It is going to be a big anti-incumbent year, and a big anti-Washington year, and what is still left a little bit up in the air after last night is how much that anti-incumbent wave, how disproportionately that anti-incumbent wave, will wash over the Democrats."

VOA: standard.2010.05.19

In addition, a number of important and controversial items are still up in the air.

FORBES: Wall Street Overhaul Not So Bad For Wall Street

Funding and plans for the rest of the route are still up in the air.

NPR: New York Expanding Nation's Biggest Transit Hub

Whether they will is still up in the air because the final cost of line sharing has not been set yet.

CNN: DSL carriers seek free use of phone wires