... 甚低频，极低频 very low frequency 甚低频波段 very low frequency band 甚低频发射 very low frequency emission; vlf emission ...
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very-low frequency band 甚低频频带
very low frequency band
甚低频段
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The utilization rate of licensed spectrum is very low in the time domain, frequency domain and space domain, while the unlicensed band is overcrowded seriously.
大部分授权频段在时域、频域和空间域的利用率很低，而公共频段出现了严重的频谱拥挤。
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