dropping-mercury electrode

例句：

1. 1. The dropping-mercury electrode was used to measure the electrical resistance of the circuit.
   使用滴汞电极来测量电路的电阻。
2. 2. During the experiment, the dropping-mercury electrode was carefully placed on the surface of the solution.
   实验中，滴汞电极被小心地放在溶液的表面。
3. 3. The dropping-mercury electrode was used as a sensitive tool for measuring small changes in electricalpotential.
   滴汞电极被用作测量电位微小变化的敏感工具。