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首页 - 英汉词典 - D字开头的单词或词组 - d-region

英语解释

d-region

汉语翻译

【电】 D区

d-region英语解释

名词 d-region:

the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves
同义词：D-layer, D region

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