| 单词 | extremely high frequency |
| 释义 | extremely high frequency in British Englishnoun a radio frequency between 30 000 and 300 000 megahertz Abbreviation: EHFextremely high frequency in American English Radio any frequency between 30,000 and 300,000 megahertz extremely high frequency in American Englishnoun Radio any frequency between 30 and 300 gigahertz Abbreviation: EHF, ehf Word origin [1950–55]This word is first recorded in the period 1950–55. Other words that entered Englishat around the same time include: allograph, bleep, point spread, point-of-sale, speech recognition |
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