It was this concept that Riemann generalized, thereby opening up new vistas in non - Euclidean geometry.
这个概念嗣后为Riemann所推广, 从而在 非 欧几里德几何学中开辟了新前景.
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This article starts with the definition of the Euclidean Geometry and the Non - Euclidean Geometry.
文章从欧几里德几何与 非 欧几里德几何的定义入手,探讨两种几何形态的各自特征.
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The advent of theory of relativity forced a drastic change in the attitude toward non - Euclidean geometry.
相对论的发现迫使对待 非 欧几里德几何的态度有激烈的变化.
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