mass spectrum line

例句：

1. 1. In mass spectrometry, the mass spectrum line is used to identify different elements in a sample.
   在质谱分析中，质量光谱线用于识别样品中的不同元素。
2. 2. The mass spectrograph was used to analyze the chemical composition of the unknown substance.
   使用质谱仪分析了未知物质的化学组成。
3. 3.The mass spectrum line of the element was determined by comparing it with known standards.
   通过将该元素的质谱线与已知标准进行比较，确定了其元素组成。