Read Edit View history 石炭纪 Shítànjì Carboniferous Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 石炭纪/ 石炭紀 Shítànjì Carboniferous time word · Carboniferous (geological period 354-292m years ago) 煤炭主要是在石炭纪时期形成的。 Edit Delete References Add reference No references for this word.
石炭纪/ 石炭紀 Shítànjì Carboniferous time word · Carboniferous (geological period 354-292m years ago) 煤炭主要是在石炭纪时期形成的。 Edit Delete