adj.暂时的,临时的,暂定的
n.临时性,临时人员
The booking is only provisional.
这只是暂定的预订。
It was announced that the times were provisional and subject to confirmation.
已宣布说这些时间是暂定的,还有待确定。
All these conclusions are provisional.
所有这些结论都是暂时性的.