As it turns out, many blind people, people with no visual perception of light at all, do have the same sleep sike as the sighted people.
据证实，许多无光感的盲人确实有和正常人一样的睡眠节律。
Somehow, the eyes of these subjects, even though they were damaged and had no visual perception of light, could tell their brain (whether it's) when there was more or less light.
这样一来，尽管眼睛受损害失去视觉，这些人的眼睛可以告知大脑是更多或是较少的光线。
As it turns out, many blind people, people with no visual perception of light at all do have the same sleep cycle as sighted people.
但是很多盲人，那些完全失去视力的人确实和视力好的人有同样的睡眠周期。
As it turns out, many blind people, people with no visual perception of light at all do have the same sleep cycle as sighted people.
但是很多盲人，那些完全失去视力的人确实和视力好的人有同样的睡眠周期。
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