Cách sử dụng
The expression "up in the air" means that something is undecided, uncertain, or unclear. It can also mean that something is not yet planned or settled. For example, if you ask your friend if they are going to attend the party, but they haven't made up their mind yet, you can say "The decision is up in the air." The expression can also refer to a situation that is unpredictable or changeable. For instance, if you are waiting for news about a job offer, but you don't know when or if you will receive it, you can say "My job prospects are up in the air." Thus, this expression is often used in situations that involve uncertainty, indecision, or unpredictability.