单词 | WWV |
释义 | WWVCOMMUNICATIONS The call letters of a radio station maintained by the National Bureau of Standards to provide standard radio and audio frequencies and other technical services, such as precision time signals and radio propagation disturbance warnings; the station broadcasts on 2.5, 5, 10, 15, 20, 25, 30, and 35 megahertz at various times. |
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