Read Edit View history 大灭绝 dàmièjué mass extinction Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 大灭绝/ 大滅絕 dàmièjué mass extinction 科学家认为地球历史上曾发生过五次生物大灭绝。 Edit Delete References Add reference No references for this word.