digital power meter

例句：

1. 1. The digital power meter is used to measure the power consumption of electronic devices.
   数字功率计用于测量电子设备的功耗。
2. 2. The engineer used a digital power meter to monitor the power usage of the building.
   工程师使用数字功率计监测大楼的电力消耗。
3. 3. The digital power meter displayed that the power consumption was within the safe range.
   数字功率计显示电力消耗在安全范围内。