radiance

radiance
noun
[mass noun]

light or heat as emitted or reflected by something
发光，明亮；热射
the radiance of the sunset dwindled and died.
落日余晖渐渐减弱直至消失。
■great joy or love, apparent in someone's expression or bearing
喜色；爱意，爱的流露
the radiance of the bride's smile.
新娘明亮的笑容。
■a glowing quality of the skin, especially as indicative of good health or youth
容光焕发
(Physics)the flux of radiation emitted per unit solid angle in a given direction by a unit area of a source
(物理)辐射；辐射率