寒武纪生命大爆发 hánwǔjìshēngmìngdàbàofā the Cambrian explosion Definitions Defs Origin Strokes Stroke Words Sentences Sents 寒武纪生命大爆发 寒武紀生命大爆發 hánwǔjìshēngmìngdàbàofā the Cambrian explosion A period about 541 million years ago when most major animal phyla appeared in the fossil record.
寒武纪生命大爆发 寒武紀生命大爆發 hánwǔjìshēngmìngdàbàofā the Cambrian explosion A period about 541 million years ago when most major animal phyla appeared in the fossil record.
