The planetarium staff also prepared talks for radio broadcast.

天文馆的工人员还要准备讲稿给电台广播。

I lost my notes and had to ad-lib the whole speech.

我把讲稿丢了，只好临时说了一通。

He tailored his speech for his audience.

他为听众修改了演讲稿。

He amended his speech by making some additions and deletions.

他对讲稿了些增删修改。

The speaker has to ad- lib his speech when his papers suddenly blow off the podium.

当演讲稿突然掉下台时，演讲者不得不现编词。

He has to extemporise because he has forgotten to bring his note

他因为忘了带讲稿,只好即席发言。