isotope broadening

例句：

1. 1.The isotopes in the sample wereanalyzed to determine their abundance.
   对样品中的同位素进行了分析，以确定它们的丰度。
2. 2. The isotope broadening ofthe sample was due to themixing of different sources.
   样品的同位素展宽是由于不同来源的混合造成的。
3. 3. The isotope spread in thesoil profile was used to estimate the ageof the rocks.
   土壤剖面中的同位素展宽被用来估计岩石的年龄。