跑光 跑 光 pǎo guāng ㄆㄠˇ ㄍㄨㄤ 跑光 解释: 解释◎ 跑光 pǎoguāng[sensitive materials are sensitive to light because lacking of stealing airtight] 胶片、感光纸等感光材料因封闭不严而感光