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 | Từ điển Oxford Learners Wordfinder Dictionary 
 
	
		| cosmic ray 
 
 highly penetrating ionizing radiation of extraterrestrial origin;
 consisting chiefly of protons and alpha particles;
 collision with atmospheric particles results in rays and particles of many kinds
 • Hypernyms:
 ionizing radiation
 • Part Holonyms:
 cosmic radiation
 
 
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