| 单词 | earth-layer propagation | 
| 释义 | earth-layer propagation [`ǝrth ´lā·ǝr ´präp·ǝ´gā·shǝn]  GEOPHYSICS 1. Propagation of electromagnetic waves through layers of the earth's atmosphere.  2. Electromagnetic wave propagation through layers below the earth's surface.  | 
	
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