spectral classification

例句：

1. 1.The spectrum of the sun is a fascinating study of light.
   太阳光谱是研究光的迷人课题。
2. 2. The scientist used a spectroscope to analyze the chemical composition of the sample.
   科学家使用分光镜分析样本的化学成分。
3. 3. The new instrument can detect and classify objects based on their spectral characteristics.
   新型仪器可以根据物体的光谱特性进行检测和分类。