Only in a flat universe does space obey all the standard geometry-class rules-the angles of a triangle add up to exactly 180 degrees and parallel lines never meet.

只有在平坦的宇宙中，空间才符合标准的几何规律——三角形的内角和精确地等于180度，平行线永远不相交。

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Silk says astronomers need to achieve a 99.9999 per cent level of confidence on the flat universe, high enough that the case startsto look compelling no matter what the starting assumptions are.

修克说，天文学家们对宇宙是平坦的观点的置信程度必须达到99.9999%，只有这样，才能无论从哪种假设开始研究都能得出令人信服的结论。

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Using modern astronomers' assumptions, which presuppose a flat universe, they calculated the probability that the universe was in one of three states: flat, positively curved or negatively curved.

他们采用现代天文学家的假设，假定宇宙是平坦的，计算出宇宙处于以下三种状态之一的可能性：平坦的，正向弯曲或反向弯曲。

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The universe is flat, infinitely prolonged, and the more common something is in it, the less we know about it.

ECONOMIST: Astronomy

First introduced by Alan Guth of MIT in 1980 to explain (among other points) why the geometry of the universe appears to be flat and why matter is distributed so evenly throughout space, the theory also offered solid grounds for modeling how galaxies formed as the universe evolved.

FORBES: While Physicists Celebrate Higgs, Cosmologists Fret About The Big Bang Model

The most widely accepted model of the universe suggests that it is both flat and infinite.

ECONOMIST: The shape of the universe