我不得不在短时间内准备一个演示。

I had to prepare a presentation ___on ___short ___notice.

由于意外事件，我可能需要在短时间内取消预约。

Due to unexpected events, I might need to cancel the appointment ___on ___short ___notice.

航班在短时间内被更改，造成了一些不便。

The flight was changed ___on ___short ___notice, causing some inconvenience.