负片也专业——玩负片影友的大本营 - 归档主题 - 色影无忌 - 关键词 底片，档案，长期保存 [gap=690]Key words photonegative,archives,long-period preservation
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photonegative effect 负光电效应
ADJ (of a material) having an electrical conductivity that decreases with increasing illumination 负趋光性的 [physics]
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