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
释的问题，空时及物理理论的意义仍不明确。
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释的问题，空时及物理理论的意义仍不明确。
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