“extremely low frequency”的概念、定义、翻译、参考文献-科学参考

单词	extremely low frequency
释义	extremely low frequency [ek`strēm·lē `lō `frē·kwǝn·sē] ^{COMMUNICATIONS} A frequency below 300 hertz in the radio spectrum. Appreviated ELF.
随便看	Buntsandstein Bunyaviridae Bunyavirus buoy buoyage buoyancy buoyancy parameter buoyancy pontoons buoyancy tank buoyancy-type density transmitter buoyant density buoyant force buoy sensor Buprestidae Buprestoidea Burali-Forti paradox buran burble burble angle burble point burden Burdigalian buret burga Burgers vector

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