The third period, from 0.8 Ma to 0.48 Ma, calcite was the major biogenous minerals instead of opal.It implied a different nutrient condition.是什么意思_The third period, from 0.8 Ma to 0.48 Ma, calcite was the major biogenous minerals instead of opal.It implied a different nutrient condition.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句