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单词 appleton layer
释义
Appleton Layer
nnoun.locationthe 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
Synset:Appleton layer F layer F region
Part Holonyms:ionosphere
Instance Hypernyms:part region
Inherited Hypernyms:appleton layerregionlocationobjectphysical entityentity
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更新时间:2025/2/3 11:31:25