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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
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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