extemporize

vt.即兴创作，即席演奏

网络解释.即席演说；〔英〕即兴演奏；即席作曲；即席演讲

词形变化:

过去式：extemporized 过去式：extemporized 过去式：extemporizing 过去式：extemporizes

派生词: extemporization

improvise wing