If you look back in evolution to say, the sea slug Aplysia, you see that the building blocks of this brain have not changed.

如果我们回首看进化早期的生物，以海蛞蝓类的海兔为例，你会发现脑的基本构成没有改变。

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We did the first experiments on a simple level doing this in terms of Aplysia, where we combined behavioral and cellular analyses.

心理学是关于大脑和心智的科学。我们用海兔做了第一个简单实验，结合了行为分析和细胞分析。

youdao

Aplysia only has 20,000 neurons, and many of them are so large and distinctive that they had been named and their functions identified.

海兔只有20000个神经元，很多又大又明显，他们都得到命名，功能也被确认。

youdao

And I focused in on the marine snail Aplysia.

CNN: A Nobel Prize with help from sea slugs