spectral emissivity

例句：

1. 1. The spectral emissivity of the sun's atmosphere is a key factor in determining its global warming effect.
   太阳大气的光谱发射率是决定其全球变暖效应的关键因素。
2. 2.The spectral emissivity of the Earth's surface varies greatly depending on the time of day and the weather conditions.
   地球表面光谱发射率因一天中的时间及天气条件而大不相同。
3. 3. The spectral emissivity of a material can be used to calculate how much light it reflects or transmits based on its composition and properties.
   根据材料的成分和性质，可以计算材料的光谱发射率或透射率。