rel·a·tiv·i·ty /ˌrɛləˈtɪvəti/
相關性,相對性,相對論
rel·a·tiv·i·ty n.
1. The state of being relative; as, the relativity of a subject.
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relativity
n : (physics) the theory that space and time are relative
concepts rather than absolute concepts [syn: theory of
relativity, relativity theory, Einstein's theory of
relativity]