dual frequency operation

例句：

1. 1. The dual-frequency operation of the device is very efficient.
   该设备的双频操作非常高效。
2. 2. The dual-frequency operation of the device allows for greater flexibility in communication.
   该设备的双频操作使通信更加灵活。
3. 3. In this new model, we have implemented a dual-frequency operation to improve signal strength and reduce interference.
   在这个新模型中，我们实施了双频操作以增强信号强度并减少干扰。