impromptu

n. 即席演出、即興曲

a. 即席的

adv. 即席

學術名詞

• 即興曲：音樂

英文釋義

1. an extemporaneous speech or remark
2. a short musical passage that seems to have been made spontaneously without advance preparation
3. with little or no preparation or forethought
4. without advance preparation