The abundant plant fossils in coal beds indicate that they originated in warm, freshwater-swampy forests, much as peat bogs form now.是什么意思_The abundant plant fossils in coal beds indicate that they originated in warm, freshwater-swampy forests, much as peat bogs form now.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句