spectral difference

例句：

1. 1. Spectral analysis is a technique used to analyze the properties of materials based on their absorption and emission spectra.
   光谱分析是一种技术，用于根据材料的吸收和发射光谱特性进行分析。
2. 2. The researcher used a spectrometer to measure the chemical composition of the sample.
   研究者使用光谱仪测量样品的化学成分。
3. 3. The spectral data collected from the satellite revealed new information about the planet's climate.
   从卫星收集到的光谱数据揭示了关于该行星气候的新信息。