So, to compare Newtonian and Einsteinian relativity, one has to turn to the cosmos.
因此,要比较牛顿相对论和爱因斯坦相对论,我们必须转向宇宙。
英语百科
Theory of relativity
The theory of relativity usually encompasses two theories by Albert Einstein: special relativity and general relativity. Concepts introduced by the theories of relativity include spacetime as a unified entity of space and time, relativity of simultaneity, kinematic and gravitational time dilation, and length contraction.