a group of illnesses caused by a viral infection (usually restricted to a specific geographic area); fever and gastrointestinal symptoms are followed by capillary hemorrhage
30 to 300 megahertz
造句
用作名詞(n.)
This radio station broadcasts only on VHF. 這家電臺(tái)只用甚高頻廣播。
These atmospheric conditions are playing merry hell with VHF reception tonight. 這些大氣環(huán)境在破壞今晚的甚高頻的接收效果。