An opaque white soft earthy limestone, which exists in deposits of vast extent and thickness in the south-east of England, and forms high cliffs…
| 单词 | θ215519 | 
| 释义 | society > occupation and work > materials > raw material > mineral material > 			[noun]		 > chalk (4)		 chalk956 An opaque white soft earthy limestone, which exists in deposits of vast extent and thickness in the south-east of England, and forms high cliffs… Subcategories:— 			type of			(3)		  | 
	
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