1.Reconstruct the paleoatmospheric CO2 concentration of the geological history is animportance issue for palaeobotanical and paleoenvironmental research.
通过气孔比率法重建地史时期的大气CO2浓度，是当前古植物学领域的重要课题。
2.Reconstruct the paleoatmospheric CO2 concentration of the geological history is animportance issue for palaeobotanical and paleoenvironmental research.
