Leave the world and enter the limbic system.

离开这个世界，进入大脑边缘系统。

The third part that I'd like to talk about is the limbic system.

我将要谈到的第三个部分是关于边缘系统。

Smell registers in the primal brain, known as the limbic system.

嗅觉在最初的大脑， 也就是通常所说的边缘系统登记。

Hippocampus is one of the important organs of the limbic system.

海马是边缘系统的一个重要器官。

These emotions—along with the limbic system—are shared by all mammals.

这些情绪，包括大脑边缘系统，是所有的哺乳动物都具有的。