radiance
/ˈreɪdɪəns/noun
mass noun
1
- 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。
1.1
- 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。
1.2
- a glowing quality of the skin, especially as indicative of good health or youth容光焕发。
2
- 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。