But diffeomorphism invariant theory leaves some problems to be explained, and the meanings of spacetime and physical theory are still in question.
但微分同胚不变理论存在需要解释的
，
时及物理理论的意义仍不
确。
But diffeomorphism invariant theory leaves some problems to be explained, and the meanings of spacetime and physical theory are still in question.
但微分同胚不变理论存在需要解释的，时及物理理论的意义仍不确。
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