double pass spectrometer

例句：

1. 1. The double passspectrometer was used to analyze the chemical composition of the sample.
   双通分光光度计被用来分析样品的化学成分。
2. 2. The double pass spectrometer was used to detect the presence of certain elements in the sample.
   双通分光光度计被用来检测样品中某些元素的出现。
3. 3. The double pass spectrometer was used to measure the absorption and scattering properties of the sample.
   双通分光光度计被用来测量样品的吸收和散射特性。