To browse through categories you need to "switch a channel" like you would do it in your radio set.

你需要“调节频道”来浏览不同的类别就像是你在收音机上做的一样。

youdao

The most important of these concepts is a channel, which represents a core abstraction for sending and receiving messages to and from a port. There are two categories of channels defined in Indigo 5

它们中最重要的是信道（channel），它抽象了给（从）端口发送（接收）消息的处理过程。

youdao

The most important of these concepts is a channel, which represents a core abstraction for sending and receiving messages to and from a port. There are two categories of channels defined in Indigo 5

它们中最重要的是信道（channel），它抽象了给（从）端口发送（接收）消息的处理过程。

youdao