UWB宽阔的频率范围包括了极低频率，美国海军将它用于与水中潜艇的通信。
UWB's broad frequency range includes the ultralow frequencies the U. s. Navy USES to communicate with submerged submarines.
众多研究表明，暴露在极低频率电磁场的儿童罹患白血病的风险增加，但极低频率电磁场似乎不增加乳腺癌和心血管疾病的发病风险。
Studies have consistently shown increasing risk for childhood leukemia associated with ELF-EMF, whereas ELF-EMF most likely are not a risking factor for breast cancer and cardiovascular disease.
这种频率属于极低频的频率范围内，通常极低频的频带范围也在300hz以下。
This falls in the extremely low frequency (ELF) range which includes frequencies up to 300 Hz.
为促进组织修复的重要频率在生物的重要极低频所有(低频)的范围。
The important frequencies for stimulating tissue repair are all in the biologically important extremely low frequency (ELF) range.
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。
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。
In audio, a very low frequency oscillation often resulting from a positive feedback path in an amplifier system.
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