spectral values

例句：

1. 1. Spectral analysis is used to identify the chemical composition of materials.
   光谱分析用于识别材料的化学组成。
2. 2.The scientist used a spectroscope to observe the spectrum of the sun.
   科学家使用分光镜观察太阳的光谱。
3. 3.The research team conducted a spectral study on the effects of pollution on the environment.
   研究小组对污染对环境的影响进行了光谱研究。