| 单词 | microwave background radiation | 
| 释义 | Definition of microwave background radiation in English:microwave background radiationnoun Astronomy 
 Origin1980s; earliest use found in Peter Davies (b. 1940). Definition of microwave background radiation in US English:microwave background radiationnoun Astronomy 
 Origin1980s; earliest use found in Peter Davies (b. 1940).  | 
	
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