请输入您要查询的英文单词:
单词
ultralow frequency
释义
ultra·low frequency
AHD
[ŭl'trə-lōʹ]
D.J.
[ˌʌltrəˈləʊ]
K.K.
[ˌʌltrəˈlo]
n.
(名词)
abbr.
ULF
【缩写】
An electromagnetic wave whose frequency is less than 3,000 hertz.
极低频率:频率少于3000赫兹的电磁波
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更新时间:2025/7/15 10:07:54