卡车司机用民用波段无线电呼救。

A truck driver used his CB radio to call for help.

《牛津词典》

我把自己那个业余无线电收音机调到通话波段，想要听一个周六早间的交流节目。

I turned the dial up into the phone portion of the band on my ham radio in order to listen to a Saturday morning swap net.

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这种通迅联系要靠21厘料波段，即每秒1420兆周的精确无线电频率。

This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.

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