英语词汇“extremely low frequency”是什么意思，“extremely low frequency”的读音、用法及例句翻译-烛光网

词汇	extremely low frequency
释义	extremely low frequencyn.（名词）abbr. ELF【缩写】 A radio frequency below 300 hertz.最低频：低于300赫的无线电频率
随便看	answering answering machine rockeries rockering rocker panel rockers rockery rocket rocket rocketed rocketeer rocketeers rocket engine rocketing rocket plane rocketries rocketry rockets rocket salad rocket science rocket scientist rocket ship rocket sled rocketsonde rockfall

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