clear sky radiance 晴空辐射
The iterative method is used to calculate sky radiance without the reflectance from underlying surface.
在不考虑下垫面的反射时，利用迭代法来计算天空亮度。
The solar radiance diffused by a randomly-rough underlying surface might lead to increase sky radiance.
随机粗糙下垫面对入射到地表的太阳辐射的漫反射必然引起天空亮度的增加。
But there, where spreads the infinite sky for the soul to take her flight in, reigns the stainless white radiance.
但是在那里，纯白的光辉，统治着伸展着的为灵魂翱翔的无际的天空。
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