You use provisional to describe something that has been arranged or appointed for the present, but may be changed in the future.
the possibility of setting up a provisional coalition government.
建立一个临时的联合政府的可能性。
These times are provisional and subject to confirmation.
这些期限是暂定的,还有待确认。
If you have never held a driving licence before, you should apply for a provisional licence.
如果你以前没有驾照,你得申请一张临时驾照。