当海洋学家研究这些样本时，他们可以看到在古新世-始新世极热时期碳循环的改变。

When oceanographers study these samples, they can see changes in the carbon cycle during the PETM.

youdao

当海洋学家研究这些样本时，他们可以看到在古新世-始新世极热时期碳循环的改变。

When oceanographers study these samples, they can see changes in the carbon cycle during the PETM.

youdao