基本解释[物理学]光反射系数英汉例句双语例句High-purity imported aluminum reflector is used to effectively improve the reflectivity and ensure the output of luminous flux.采用高纯度进口铝反射罩,有效提高了反射率,并确保了光通量的输出。luminous reflectivity更多例句词组短语短语luminous intensity reflectivity 发光反射系数luminous reflectivity更多词组专业释义物理学光反射系数