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The significance of frequency selection lies in the ability to filter out unwanted frequencies and select specific frequencies for communication or other purposes. It helps to ensure that only the desired signal is received or transmitted, reducing interference and improving the quality of communication.
频道选择器（Channel selector）是一种电子设备，用于在多个频道中选择一个特定的频道，它的作用类似于调谐器，可以调整接收器的频率以匹配所选频道的频率，通过频道选择器，用户可以轻松地切换不同的频道，收听或观看不同的内容，这在广播、电视和其他通信领域中非常常见，英文表达为：The significance of channel selection lies in its ability to filter out unwanted channels and select specific channels for communication or other purposes, such as watching TV or listening to the radio. It allows users to easily switch between different channels and enjoy different content.频道选择器通常用于电视、收音机和其他通信设备中，帮助用户选择他们想要接收的信号或频道。