Of course, you can add whatever logic you want, extra channels, user validation and login, and so on.

当然，您可以添加您想要的任何逻辑，额外的通道、用户验证和登录，等等。

youdao

Public broadcasters levy a compulsory fee, but relatively few people pay cable or satellite broadcasters for extra channels.

虽然公共电视台征收强制费用，但是很少有人为通过有线电视或者卫星电视接收的额外频道而多付费用。

youdao

Mappers are handled using external DLLs, complete with extra sound channels for most games which provide them.

映射器使用外部DLL处理，这与大多数游戏为他们提供额外的音频通道完成。

youdao

Public broadcasters levy a compulsory fee, but relatively few people pay cable or satellite broadcasters for extra channels.

ECONOMIST: By moving slowly, the German media market stays ahead

Plug a wire into your set and get a dozen extra channels.

FORBES: The TV Tussle

The real kick in the face is the fact that if you buy the NFL SUNDAY TICKET, you still won't get the HD games unless you have the SuperFan package and other than the HD channels only includes extra SD channels, like the Red Zone.

ENGADGET: DirecTV's new HD pricing HD