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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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更新时间：2026/5/31 6:10:43