| 单词 | rock-breaking | 
| 释义 | > as lemmasrock-breaking   rock-breaking  n. ΚΠ 1838    C. Darwin in  Life & Lett. 		(1887)	 I. 292  				The good science of rock-breaking. 1916    G. J. Young Elem. Mining vi. 115  				The final measure of success in planning the details of rock breaking, etc., is the advance made in a given time. 2002    M. McGrath Silvertown 		(2003)	 xviii. 176  				Afternoon brought the ‘grades’, work of varying arduousness, from weaving to rock-breaking. < as lemmas  | 
	
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