electron spectroscopy for chemical analysis

例句：

1. 1.The electron spectroscopy technique is used to analyze the chemical composition of materials.
   电子光谱学技术用于分析材料的成分。
2. 2. In electron spectroscopy, the spectrum is generated by bombarding a sample with electrons.
   在电子光谱学中，通过向样品发射电子来产生谱线。
3. 3. Electron spectroscopy has been widely used in the analysis of environmental samples.
   电子光谱学在环境样本的分析中得到了广泛应用。