https://www.youtube.com/watch?v=eMTyEpigXXc&feature=youtu.be
Youtube上一段很有启发性的视频讲述灯与视力的关系
百字令929 (2015-03-23 04:34:25) 评论 (0)https://www.youtube.com/watch?v=eMTyEpigXXc&feature=youtu.be
海外博客
Youtube上一段很有启发性的视频讲述灯与视力的关系
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