“radio spectrum”的概念、定义、翻译、参考文献-科学参考

单词	radio spectrum
释义	radio spectrum [`rād·ē·ō `spek·trǝm] ^{COMMUNICATIONS} The entire range of frequencies in which useful radio waves can be produced, extending from the audio range to about 300,000 megahertz. Also known as radio-frequency spectrum.
随便看	initial inverse voltage initialize initial landform initial lead initial line initial lock mechanism initial mass initial mass function initial nuclear radiation initial orders initial permeability initial potential initial program load initial program load button initial saturation initial set initial shot start pressure initial surge voltage initial-value problem initial-value theorem initial velocity initial yaw initiate initiating agent initiation

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