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单词 E layer
释义
E layer
n.
A region of the ionosphere, extending from about 90 to 150 kilometers (55 to 95 miles) above the earth and influencing long-distance communications by strongly reflecting radio waves in the range from one to three megahertz. Also called E region, Heaviside layer, Kennelly-Heaviside layer.
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更新时间:2025/3/22 11:19:56