rel·a·tiv·i·ty
noun/ˌreləˈtɪvəti/
/ˌreləˈtɪvəti/
[uncountable]- (physics) Einstein’s theory of the universe based on the principle that all movement is relative and that time is a fourth dimension related to space
相对论 - (formal) the state of being relative and only able to be judged when compared with something else
相对性