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单词 luminous flux
释义 DEFINITIVE EXAMPLES 权威例句〔luminous efficiency〕The ratio of the total luminous flux to the total radiant flux of an emitting source.发光系数:任何光源所辐射的总光通量与该光源总辐射通量之比美国传统〔luminous intensity〕The luminous flux density per solid angle as measured in a given direction relative to the emitting source.发光强度:在光源的某一给定方向上测量的固定单位角度上光通量密度美国传统
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