The lowering of ()~(87)Sr/()~(86)Sr ratio of the Upper Ordovician marine carbonate may have a relation to the influence of the mantle source fluid.是什么意思_The lowering of ()~(87)Sr/()~(86)Sr ratio of the Upper Ordovician marine carbonate may have a relation to the influence of the mantle source fluid.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句