| 单词 | mass-energy equivalence | 
| 释义 | mass-en·er·gy equivalence (măsĕnər-jē) n.  The physical principle that a measured quantity of energy is equivalent to a measured quantity of mass. The equivalence is expressed by Einstein's equation E = mc2, where E represents energy, m the equivalent mass, and c the speed of light.  | 
	
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