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单词 relativity
释义 relativity
n.
  1. the fact or state of being relative.
  2. Physics a (special theory of relativity) a theory based on the principle that all motion is relative and that light has constant velocity, regarding space-time as a four-dimensional continuum, and modifying previous conceptions of geometry. b (general theory of relativity) a theory extending this to gravitation and accelerated motion.
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