| 单词 | rest mass | 
| 释义 | > as lemmasrest mass   rest mass  n. Physics the mass of an object as measured in a frame of reference in which it is at rest. ΚΠ 1914    L. Silberstein Theory of Relativity vii. 193  				The coefficient m is called the rest-mass of the particle. 1979    Jrnl. Royal Soc. Arts 127 577/2  				Nuclear fusion can convert 0·7 per cent of the rest mass of the hydrogen core into energy. 2006    P. C. W. Davies Goldilocks Enigma 		(2008)	 ii. 32  				A photon is said to have zero rest mass, but it can never be at rest. < as lemmas  | 
	
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