The fossil find shows some modern animal behavior has very old roots, Sereno said.

Sereno说这次化石的发现显示了一些现代的动物行为能追溯到远古时期。

youdao

The fossil find shows some modern animal behavior has very old roots, Sereno said.

Sereno说这次化石的发现显示了一些现代的动物行为能追溯到远古时期。

youdao