A mathematical structure is an abstract, immutable entity existing outside of space and time.

数学结构是一种抽象、不可变的实体，超脱于时间与空间之外。

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A mathematical structure is an abstract, immutable entity existing outside of space and time.

数学结构是一种抽象、不可变的实体，超脱于时间与空间之外。

youdao