Cambrian The earliest period of the Paleozoic era, about 590-510 million years ago.
Cambrian The earliest period of the Paleozoic era, about 590-510 million years ago.
寒武纪:地质年代古生代的第一个纪，在五亿九千万到五亿一千万前。
Cambrian The earliest period of the Paleozoic era, about 590-510 million years ago.
寒武纪:地质年代古生代的第一个纪，在五亿九千万到五亿一千万前。