The Lower Palaeozoic group mainly includes Cambrian, medial and lower Ordovician, which are marine carbonate in the district.是什么意思_The Lower Palaeozoic group mainly includes Cambrian, medial and lower Ordovician, which are marine carbonate in the district.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句