复数：luminosities
1.光明,光辉
2.【物】发光度;(辐射能的)发光效率
3.发光物,发光体;辉点
4.【核】(射束中的)加速粒子数密度
1.the state or quality of being luminous
2.the energy radiated per second by an astronomical object.
3.the visual perception of the extent to which an object emits light
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