double-arm spectrometer

例句：

1. 1.The double-arm spectrometer was used to analyze the chemical composition of the sample.
   双臂光谱仪被用来分析样品的化学成分。
2. 2. The double-arm spectrometer was used to detect the presence of pollutants in the air.
   双臂光谱仪被用来检测空气中污染物的存在。
3. 3. The double-arm spectrometer was used to study the absorption and scattering properties of matter.
   双臂光谱仪被用来研究物质的吸收和散射特性。