extra

a.额外的 ad.特别地 n.额外的事物

extermination, external, external evidence, external examination, external examiner (also external), externalize, externalize, externalise, externally, extinct, extinction, extinguish, extirpate, extirpation, extol, extort, extortion, extortionate, extortionately, extortioner, extortionist, extra-, extra-curricular, extra-marital, extra-sensory perception, extract, extraction, extractor, extradite, extradition, extramural, extraneous, extraordinarily, extraordinary, extrapolate, extrapolation, extraterrestrial, extraterritorial, extravagance, extravagant, extravagantly,