In this paper, the basic assumption is different from the "common curvature" and the "concentrated loading" assumptions used before, but is the combination of them both.

本文的基本假设与以往的“共同曲率”或“集中载荷”的假设不同，采取了这两者相结合的假设。

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Negative curvature is a little trickier to visualize. The most common description is a saddle.

了解负曲率宇宙要动点脑筋，最常见的描述就是它像马鞍。

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Besides common geometric measurements such as distances and angles, a new measurement of average curvature energy defined for boundary curve segment is included in the set to describe curve feature.

除了常见的几何测量(如距离和角度)外，提出了一种平均曲率能量的测量方法来描述边界曲线特征。

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