为了印证环境情况与人类历史之间的关系，科学家们研究了超过7200多块树龄在2500年以上的古树化石。

To match the environmental record with the historical one, researchers looked at more than 7, 200 tree fossils from the past 2, 500 years.

youdao

为了印证环境情况与人类历史之间的关系，科学家们研究了超过7200多块树龄在2500年以上的古树化石。

To match the environmental record with the historical one, researchers looked at more than 7,200 tree fossils from the past 2,500 years.

youdao