以下为句子列表：
英文: The danger to vision of inadequately protected viewing of the sun is significant because light-induced retinal injuries occur without any feeling of pain (there are no pain receptors in the retina), and the visual effects do not occur for at least several
中文: 在不适当的保护下观测太阳是极度危险的,因为光照造成的视网膜损伤是不会产生痛楚的(视网膜上没有痛觉神经),以及视网膜会在受损后最少数小时后才会出现徵状!
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