大灭绝 dàmièjué mass extinction Definitions Defs Origin Strokes Stroke Words Sentences Sents 大灭绝 大滅絕 dàmièjué mass extinction The complete disappearance of a large number of species within a relatively short period of geological time
大灭绝 大滅絕 dàmièjué mass extinction The complete disappearance of a large number of species within a relatively short period of geological time
