辐射的行为；光线的发射
辐射的行为；光线的发射；发出辐射或受到辐射的事物；光辉；灿烂；明亮。
辐射的行为；光线的发射
The act of irradiating; emission of rays of light.
发出辐射或受到辐射的事物；光辉；灿烂；明亮。
That which irradiates or is irradiated; lustre; splendour; brilliancy.
单位面积表面接收的辐射功率
The radiant power received by unit area of surface.
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