thermal spectrum

例句：

1. 1. The thermal spectrum of the sun is used to determine its temperature.
   太阳的热谱用于确定其温度。
2. 2. The thermal spectrum of the atmosphere shows variations in temperature and humidity.
   大气的热谱显示了温度和湿度的变化。
3. 3. The thermal spectrum of a blackbody radiation source can be used to calculate its temperature.
   黑体辐射源的热谱可以用来计算其温度。