isotope geothermometer

例句：

1. 1. The isotopes in the sample were analyzed using the new geothermometer.
   使用新的地质测温仪分析了样本中的同位素。
2. 2.The isotopic geothermometer was used to determine the temperature of the underground water.
   使用同位素地质测温仪来确定地下水的温度。
3. 3. The isotopic geothermometer was a valuable tool for studying the geological history of the region.
   同位素地质测温仪是研究该地区地质历史的一种宝贵工具。