radiosity

例句：

1. 1. The sun's radiosity is a measure of its energy output.
   太阳的放射性亮度是衡量其能量输出的一个指标。
2. 2. The radiance of the stars in the night sky is breathtaking.
   夜空中星星的辐射亮度令人叹为观止。
3. 3. Luminosity is a measure of how bright an object appears to the eye.
   发光度是衡量物体对眼睛看起来多亮的一个指标。