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问题，
物理理论的意义
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需要解释的问题，物理理论的意义不明确。
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