Xiāngduìlùn gǎibiàn le rénlèi duì shíjiān hé kōngjiān de rènshí.
The theory of relativity changed humanity's understanding of time and space.
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相对论 refers to Einstein's theories: 狭义相对论 (special relativity, 1905) and 广义相对论 (general relativity, 1915). In everyday speech, 相对 means 'relative' or 'comparatively,' but 相对论 specifically refers to Einstein's physics.
