英语词汇“d region”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	d region
释义	d region noun Usage: usually capitalized D : the lowest part of the ionosphere occurring between 25 and 40 miles above the surface of the earth and capable of reflecting radio waves of very low frequency but absorbing energy of radio waves of high frequencies that are reflected by higher ionosphere layers
随便看	-ally all-year allyl allyl allyl alcohol allyl aldehyde allylamine allylate allylation allyl chloride allylene allylene allylic allylic allylic rearrangement allyl isothiocyanate allyl mustard oil allylnormorphine allyl plastic allyl resin allyl starch allylthiourea allège allée allée

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