| 单词 | ash-bed | 
| 释义 | > as lemmasash-bed   ash-bed  n. a thick layer of ash. ΘΚΠ the world > the earth > structure of the earth > structural features > sedimentary formation > 			[noun]		 > stratum > stratum by constitution > ash ash-bed1849 1849    R. I. Murchison Siluria iv. 77  				Felspathic agglomerates and Ash-beds. < as lemmas  | 
	
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