two-tone channel

例句：

1. 1. The two-tone channel is a feature that allows users to switch between different color schemes.
   双色调通道是一个功能，允许用户在切换不同的颜色方案。
2. 2.In the digital age, two-tone channels are becoming increasingly important for broadcasters.
   在数字时代，双色调频道对于广播公司来说变得越来越重要。
3. 3. The two-tone channel is used to transmit audio signals in both monochrome and color formats.
   双色调通道用于传输音频信号，既可以是单色也可以是彩色格式。