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。
But how do you find a fossil of a symbolic thought?
但你如何找到一块象征性思维的化石呢？
Whatever you have in mind you can find it in a Fossil.
无论你想到你可以找到它的化石。
Whatever you have in mind you can find it in a Fossil.
无论你想到你可以找到它的化石。
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