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	Trends of D region View usage for: D region in British English or D layer noun the lowest region of the ionosphere, extending from a height of about 60 kilometres to about 90 kilometres: contains a low concentration of free electrons and reflects low-frequency radio waves See also ionosphere D region in American English the lowest atmospheric zone within the ionosphere, at an altitude of c. 55 to 90 km (c. 34 to 56 mi), containing the D layer
随便看	primarily primariness primary primary accent primary campaign primary care primary cell primary color primary colour primary containment primary dentition primary education primary election primary electron primary feather primary focus primary health care primary industry primary insurer primary metal primary mirror primary motivation primary objective primary processes primary producer

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Trends ofD region