| 单词 | Frequency Waves,Ultrahigh |
| 释义 | Frequency Waves,Ultrahigh《英文msh词典》Frequency Waves,Ultrahigh [入口词] Frequency Waves,Ultrahigh [主题词] Radio Waves [英文释义] That portion of the electromagnetic spectrum beyond the microwaves,with wavelengths as high as 30 KM. They are used in communications,including television. Short Wave or HF (high frequency),UHF (ultrahigh frequency) and VHF (very high frequency) waves are used in citizen's band communication. |
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