In this paper, the basic assumption is different from the "commoncurvature" 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。
2
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。
3
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.