spectral analysis

例句：

1. 1. The scientist used a spectroscope to analyze the chemical composition of the sample.
   科学家使用光谱仪分析了样品的化学成分。
2. 2. The researcher discovered new spectral lines in the sky.
   研究员在天空中发现了新的光谱线。
3. 3. The engineer designed a device that can measure the spectral properties of light.
   工程师设计了一种可以测量光的光谱特性的设备。