波长较短的电磁波；尤指波长在10至100米之间、频率在3至30兆赫兹之间的电磁波。
波长较短的电磁波；尤指波长在10至100米之间、频率在3至30兆赫兹之间的电磁波。
波长较短的电磁波；尤指波长在10至100米之间、频率在3至30兆赫兹之间的电磁波。
An electromagnetic wave with a relatively short wavelength; specifically, one with a wavelength generally between 10 and 100 metres, corresponding to a frequency between 3 and 30 megahertz.
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