indicating electrode

例句：

1. 1. The device uses an indicating electrode to measure the concentration of pollutants in the water.
   该设备使用指示电极来测量水中污染物的浓度。
2. 2.The scientist used a indicating electrode to detect the presence of bacteria in the sample.
   科学家使用指示电极来检测样本中的细菌存在。
3. 3.The indicating electrode was used to indicate when the temperature reached the boiling point.
   指示电极被用来指示温度达到沸点时的情况。