石炭系 shítànxì carboniferous system Definitions Defs Origin Strokes Stroke Words Sentences Sents 石炭系 shítànxì carboniferous system the global chronostratigraphic unit of rock strata corresponding to the Carboniferous period Frequency Written text 0.253 per million Sources Definitions CC-CEDICT Frequency data BCC Corpus (BLCU)
石炭系 shítànxì carboniferous system the global chronostratigraphic unit of rock strata corresponding to the Carboniferous period Frequency Written text 0.253 per million Sources Definitions CC-CEDICT Frequency data BCC Corpus (BLCU)
