But now we try to understand that in terms of the development of a part of their brain called the limbic system, so I'm going to show you the limbic system in red in the slide behind me, and also on this brain.
但现在我们根据他们大脑某部分叫边缘系统的发育 尝试去理解他们， 我会在背后的幻灯片里 给你们看下红色的边缘系统，这个大脑里也有。