Einstein's theory of relativity serves as the only theory which can explain this phenomenon.
Einstein's theory of relativity serves as the only theory which can explain this phenomenon.
爱因斯坦的相对论是唯一可以解释这种现象的理论。
Einstein's theory of relativity serves as the only theory which can explain this phenomenon.
爱因斯坦的相对论是唯一可以解释这种现象的理论。