演出持续了一个小时，然后灯光熄灭，不到5分钟广场上已经空无一人，所有的人都走在平壤漆黑的街道上回家。

The show lasted for one hour, then the lights were turned off, and less than 5 minutes the square was empty and everybody goes home in the dark streets of Pyongyang.

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不过爱迪生在千次失败尝试后，的的确确找到了一种可以升温至白炽却不会烧起来的钢丝，持续的白炽就带来了灯光。

A thousand failures later, Thomas Edison burned a steel wire white hot that never burned up. Continuous white heat creates light.

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因此，依据这个理论，如果持续几年在昏暗的灯光下读书，那么眼球就会略微增大，为使视网膜上的成像更清晰。

The theory is that if you were to read in dim light for a few years, the eye will tend to grow slightly larger to make the peripheral images on the retina clearer.

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