n.即席作成；即席演说；即兴之作
I didn't prepare lecture for tonight's speech, so I have to give an extemporization. 今晚的讲演我没有准备讲稿，所以只有现场发挥了。
The extemporization of piano accompaniment is the teaching curriculum in the highteachers' school that has been attached more and more value. 钢琴即兴伴奏作为高师音乐教学中的一门课程,越来越受到重视。
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. 这里的宣纸隔一阵要换上新的，因为主人爱好书法的朋友会来贴上自己的即兴之作。
