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字词 短波
释义 短波duǎnbō波长50—10米(频率6—30兆赫)的无线电波。以天波的方式传播,用于无线电广播和电报通讯等方面。{shortwave (wavelength between 50-10 metres and frequency between 6-30 MHz), with radio signals transmitted by way of sky waves for broadcasting and telegraph telecommunication}
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更新时间:2025/1/15 18:44:20