“即席的”用英语怎么说？

即席的, 无准备的:毫无准备地说 、 表演 、 做或作曲的;临场的.Spoken, performed, done, or composed with little or no preparation ; extemporaneous.即席的,即兴的:未经或很少准备或构思而讲的 、 做的或谱写的.Spoken, done, or composed with little or no preparation or forethought....