1. It usually takes more than three weeks to prepare a good impromptu speech. 一般我要花费三周以上来准备一个好的即兴演讲。
2. The topic for your impromptu speech is, Which is more important for you: knowledge from books or personal experience? 下面你即兴演讲的题目是：“书本上的知识和人生经验，哪一个对你更重要？”
3. In an impromptu news conference outside the ballroom, a family spokesman said the couple had no plans for a honeymoon cruise. 在舞厅外举行的一次非正式新闻发布会上，家庭的发言人说：小夫妻没有蜜月旅行计划。
英英解释
n.
1. an extemporaneous speech or remark
2. a short musical passage that seems to have been made spontaneously without advance preparation adj.
1. with little or no preparation or forethought
2. without advance preparation
