英语词汇D-region怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	D-region
释义	Definition of D-region in English: D-region noun another term for D-layer Example sentencesExamples The altitude of the D-region ionosphere is too low for satellite measurements of electron density. Negative ions are a feature of the D-region ionosphere, where they hold a substantial portion of the negative charge.
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Definition of D-region in English: