n.即席作成；即席演說；即興之作

I didn't prepare lecture for tonight's speech, so I have to give an extemporization. 今晚的講演我沒有準備講稿，所以只有現(xiàn)場發(fā)揮了。

The extemporization of piano accompaniment is the teaching curriculum in the highteachers' school that has been attached more and more value. 鋼琴即興伴奏作為高師音樂教學中的一門課程,越來越受到重視。

The rice paper here lies between to want to be changed new, because give priority to a person,hobby calligraphic friend can affix his extemporization. 這里的宣紙隔一陣要換上新的，因為主人愛好書法的朋友會來貼上自己的即興之作。