ESR spectrum

例句：

1. 1. The ESR spectrum of the sample was analyzed to determine its chemical composition.
   通过分析样品的ESR谱，确定了其化学成分。
2. 2. This method is particularly useful for analyzing materials with complex electronic structures.
   这种方法特别适用于分析具有复杂电子结构的材料。
3. 3. The ESR spectrum of the sample revealed a significant amount of paramagnetic impurities.
   样品的ESR谱显示了显著的顺磁性杂质。