So a vaccine is designed in order to engage that biology, in order to provide antigens that will stimulate specifically your immune system.

所以疫苗的作用就是参与这个生理活动,提供抗原 来刺激你的免疫系统

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And you can see this expanding rings of activity of stimulating, Cause a pattern of activities that move forward from the back of the brain to the front of the brain, in a very regular pattern which we call a visual field map.

眼睛在前面，指向这个红点，大家看到，刺激活动不断扩大的环路,引起一个活动的模式，从大脑的后不向前部移动，这一模式十分规律，我们可以称其为视觉分布图。

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