为了研究人类群体基因分离的最古老证据，赖希和同事们对这些数据进行了研究。

Reich and his colleagues probed their data for the oldest evidence of human groups genetically separating from one another.

youdao

那么，在从地球上最古老的岩石中提取的岩石样本中，我们发现了什么液态水环境的证据呢？

So, what evidence of a liquid water environment did we find in rock samples taking from the oldest rocks on Earth?

youdao

这个“二人组”就成了已知最古老的化石证据，来支持无气门亚目一类螨虫的搭便车现象，或称寄载现象。

That makes the duo the oldest known fossil evidence of hitch-hiking behavior, or phoresy, in a large group of mites called the Astigmata.

youdao