two-frequency channel

例句：

1. 1.This device can transmit data over two-frequency channels.
   这个设备可以通过双频信道传输数据。
2. 2.The two-frequency channel is a popular choice for remote control signals.
   双频信道是遥控信号的热门选择。
3. 3.In this study, we used two-frequency channels to monitor the performance of the system.
   在这项研究中，我们使用双频信道来监测系统的性能。