electron-proton spectrometer

例句：

1. 1. This instrument is used to analyze the chemical composition of materials.
   这个仪器用于分析材料的化学成分。
2. 2. The electron-proton spectrometer was used to detect the presence of trace elements in the sample.
   电子-质子光谱仪被用来检测样本中痕量元素的出现。
3. 3.The electron-proton spectrometer has proven to be a valuable tool for studying the properties of materials.
   电子-质子光谱仪已被证明是研究材料性质的一种宝贵工具。