extemporaneous

a. 无准备的,即席的,临时的

expressionism, expressionist, expressionless, expressive, expressively, expressiveness, expressly, expressway, expressway (also throughway), expropriate, expropriation, expulsion, expunge, expurgate, expurgation, exquisite, exquisitely, exquisiteness, ext, extant, extemporaneously, extempore, extemporization, extemporisation, extemporize, extemporize, extemporise, extend, extended, extended family, extension, extensive, extensively, extensiveness, extent, extenuate, extenuating, extenuation, exterior, exterminate, extermination, external,