extinction

n. 熄灭，消灭

extended family, extension, extensive, extensively, extensiveness, extent, extenuate, extenuating, extenuation, exterior, exterminate, extermination, external, external evidence, external examination, external examiner (also external), externalize, externalize, externalise, externally, extinct, extinguish, extirpate, extirpation, extol, extort, extortion, extortionate, extortionately, extortioner, extortionist, extra, extra-, extra-curricular, extra-marital, extra-sensory perception, extract, extraction, extractor, extradite, extradition,