two-beam interference spectrometer

例句：

1. 1.This instrument is used to measure the concentration of pollutants in water.
   这种仪器用于测量水中污染物的浓度。
2. 2.The two-beam interference spectrometer was used to analyze the chemical composition of the sample.
   双光束干涉光谱仪被用来分析样本的化学成分。
3. 3. The two-beam interference spectrometer was used to detect the presence of a specific element in the sample.
   双光束干涉光谱仪被用来检测样本中特定元素的出现。