Very low frequency 甚低频 ; 超低频 ; 特低频 ; 低频
very low frequency antenna [电讯] 甚低频天线
very low frequency electromagnetical receiver [地物] 甚低频电磁仪
very low frequency receiver 甚低频接收机
very low frequency emission 甚低频发射
very low frequency radiation 甚低频辐射
very-low frequency band 甚低频频带
very low frequency method 甚低频法
very-low-frequency positioning system 甚低频定位系统
vlf very low frequency 甚低频 ; 超低频
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N a radio-frequency band or radio frequency lying between 3 and 30 kilohertz 甚低频 ( abbr: VLF)
SH lighting is very low frequency. You can't have sharp lighting transitions with SH lights. They are also only affecting the diffuse lighting (too low frequency for specular highlights).
球面调和光只有很低的频率。球面调和光不能产生锋利的照明过渡。它们也只会影响散射光照（对高光来说，球面调和光的频率太低了）。
In audio, a very low frequency oscillation often resulting from a positive feedback path in an amplifier system.
在音响设备中出现的振荡频率极低的低频振荡，常因放大系统的正反馈回路引起。
This paper deals with a digital speech communicator of very low frequency and low bit digital communication based on software ratio, which USES the technique of QPSK and FEC coding.
本文论述了一种基于软件无线电的甚低频低码率语音数字岩层通信机，它采用了QPSK调制和FEC信道编码技术。
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