Yan Zhao at Lanzhou University and co-workers 1 have found an alternative climate indicator for lower areas - pollen trapped in lake sediments.

兰州大学赵艳及其合作者的研究工作证明在低海拔地区，湖泊沉积物中的孢粉可以作为很好的气候指示物。

youdao

Yan Zhao at Lanzhou University and co-workers 1 have found an alternative climate indicator for lower areas - pollen trapped in lake sediments.

兰州大学赵艳及其合作者的研究工作证明在低海拔地区，湖泊沉积物中的孢粉可以作为很好的气候指示物。

youdao