英语词汇“F region”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	F region
释义	F region 'ef,ri:dʒiən 基本英英近义反义 F区 Noun: the highest region of the ionosphere from 90 to 600 miles up which contains the highest concentration of free electrons and is most useful for long-range radio transmission近义词 F layer电离层Appleton layer阿普顿层
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