voltmeter-ammeter

例句：

1. 1. The engineer used a voltmeter to measure the voltage across the circuit.
   工程师使用电压表来测量电路上的电压。
2. 2. The doctor measured the patient's blood pressure with an ammeter.
   医生用血压计测量病人的血压。
3. 3. The technician was required to check both the voltmeter and ammeter before starting the experiment.
   技术人员在开始实验之前需要检查电压表和电流表。