英语词汇D region的读音、翻译及短语词组释义-英汉双解词典-求索网

单词	D region
释义	D region D region n.（名词）The region of the ionosphere about 40 to 65 kilometers (25 to 40 miles) above the earth.D区：电离层中处于地球表面以上40至65公里(25至40英里）的部分
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