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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Another characteristic of these years, which scholars refer to as the Dark Ages, just as they do the years after the fall of the Roman Empire-- dark for two reasons. Dark, in the most obvious way, because we don't have any writing, no record of them.

这也是这段时期的另一个特征,学者们称之为,黑暗时代,他们也是这么称呼,罗马帝国陷落后的那段时期的,称黑暗主要有两个原因,黑暗,最明显的理由,是因为我们没有任何关于他们的史料和记录

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