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 Definition:The geologic age of a fossil,or a geologic event or structure expressed in units oftime,usually years,also known as actual age.绝对年龄jué duì nián líng化石、岩石等地质体的地质年龄,通常采用同位素测年方法获得,故也称为“同位素年龄”。本名词与“......(本文共 360 字) [阅读本文] >>