单词 | extremely low frequency |
释义 | extremely low frequencynoun Radio.any frequency between 30 and 300 hertz. Abbreviations: ELF, elf Origin of extremely low frequencyFirst recorded in 1965–70 Words nearby extremely low frequencyextremal, extreme, extreme fighting, extremely, extremely high frequency, extremely low frequency, extreme programming, extreme sport, extreme unction, extremism, extremist Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for extremely low frequencyextremely low frequency nouna radio frequency or radio-frequency band below 3 kilohertzAbbreviation: ELF Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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