英语词汇“time and frequency standard”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	time and frequency standard
释义	time and frequency standard time and frequency standard A reference value of time and time interval. Standards of time and frequency are determined by astronomical observations and by the operation of atomic clocks and other advanced timekeeping instruments. They are disseminated by transport of clocks, radio transmissions, satellite relay, and other means.
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