名词
中文翻译：频道切换器
同义词：
['switch', 'controller', 'knob', 'dial']
例句：
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1.The channel switch on the remote controls allows you to change channels easily.
遥控器上的频道切换器让你轻松切换频道。
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2. The engineer had to switch the channel switch to get the signal back on.
工程师不得不切换频道开关才能恢复信号。
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3. The new software has a built-in channel switch that makes it easy to navigate through different channels.
新软件内置了频道切换功能，使用户可以轻松导航不同的频道。