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单词 cosmic background radiation
释义

WordReference Random House Unabridged Dictionary of American English © 2024
cosmic background radia′tion, [Astron.]
  1. Astronomyelectromagnetic radiation coming from every direction in the universe, considered the remnant of the big bang and corresponding to the black-body radiation of 3 K, the temperature to which the universe has cooled. Also called cosmic microwave back′ground. 

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