luminous energy
柯林斯詞典
1. N energy emitted or propagated in the form of light; the product of a luminous flux and its duration, measured in lumen seconds 發(fā)光能量 ( symbol: )
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1. N energy emitted or propagated in the form of light; the product of a luminous flux and its duration, measured in lumen seconds 發(fā)光能量 ( symbol: )