[N-UNCOUNT 不可数名词]相对论 The theory of relativity is Einstein's theory concerning space, time, and motion.
[TECHNICAL 术语]
Oxford
rela·tiv·ity/ˌreləˈtɪvəti; NAmEˌreləˈtɪvəti/noun[uncountable ]1( physics 物) Einstein's theory of the universe based on the principle that all movement is relative and that time is a fourth dimensionrelated to space 相对论2( formal) the state of being relativeand only able to be judged when compared with sth else 相对性relativityrelativitiesrela·tiv·ity/ˌreləˈtɪvəti; NAmEˌreləˈtɪvəti/