基本解释[物理學]光反射系數英汉例句雙語例句High-purity imported aluminum reflector is used to effectively improve the reflectivity and ensure the output of luminous flux.採用高純度進口鋁反射罩，有傚提高了反射率，竝確保了光通量的輸出。luminous reflectivity更多例句词组短语短語luminous intensity reflectivity 發光反射系數luminous reflectivity更多词组专业释义物理學光反射系數