短語(yǔ)詞組短語(yǔ)THE E CARBONIFEROUS PERIOD 石炭紀(jì)carboniferous -persian period 石炭Permo -carboniferous period 石炭二疊紀(jì)The Carboniferous Period 石炭紀(jì)permian -carboniferous period 石炭系二疊系early -carboniferous period 早石炭世carboniferous period permian period 石炭 返回 carboniferous period