英语词汇“critical frequency”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	critical frequency
释义	critical frequency critical frequency [′krid·ə·kəl ′frē·kwən·sē] (electronics) cutoff frequency (electromagnetism) The limiting frequency below which a radio wave will be reflected by an ionospheric layer at vertical incidence at a given time. (geophysics) The minimum frequency of a vertically directed radio wave which will penetrate a particular layer in the ionosphere; for example, all vertical radio waves with frequencies greater than the E-layer critical frequency will pass through the E layer. Also known as penetration frequency. See FCRIT See FCRIT
随便看	there's no way to tell there's nowt so queer as folk there's one born every minute there's one for (record) the book(s) there's one for the book there's one for the books there's one for the record book there's one for the record books there's only one thing for it there's other fish in the sea there's other good fish in the sea there's other pebbles on the beach the resource group the respiratory system there's plenty more fish in the sea there's plenty more pebbles on the beach there's plenty of fish in the sea there's plenty of other fish in the sea there's plenty of other pebbles on the beach there's plenty of pebbles on the beach there's reason in the roasting of eggs there's safety in numbers there's somebody for you there's some/no question of something/of doing something there's someone for you

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