spectrum of first order

例句：

1. 1. The spectrum of the light is a fascinating study of colors.
   光的光谱是研究颜色的迷人课题。
2. 2.The spectrum of the stars in the night sky is incredibly vast.
   夜空中星星的光谱极其广阔。
3. 3. The scientist used a spectroscope to analyze the spectrum of the molecule.
   科学家使用分光镜来分析分子的光谱。