differential photo-electronic spectrometer

例句：

1. 1.The differential photo-electronic spectrometer was used to analyze the chemical composition of the sample.
   差分光电光谱仪被用来分析样品的化学成分。
2. 2. The differential photo-electronic spectrometer was used to detect the presence of pollutants in the air.
   差分光电光谱仪被用来检测空气中污染物的存在。
3. 3. The differential photo-electronic spectrometer was used to study the absorption spectra of different compounds.
   差分光电光谱仪被用来研究不同化合物的吸收光谱。