leave in the air

v.

使悬而不决；

Spain's staff shortages leave astronomy plans up in the air
Federal lawsuit could leave tobacco bonds up in the air
N.J. lawmakers leave fate of school bill up in the air
Data delays leave satellite research up in the air
Clean Air Act Amendments Leave Small Business Up in the Air
Coalbed Methane: Recent Court Decisions Leave Ownership Up in the Air, But New Federal and State Legislation Should Facilitate Produ...
Still Needing NATO Aid, Afghan Future Up in the Air; Trainers of Flight Forces Won't Leave until 2017
Border Delay Data Leave Fliers Up in the Air
Further Superjumbo Delays Leave Emirates Deal 'Up in the Air'
Tape prices leave buyers up in the air