There was a flat space near the door of the cavern.

洞窟门前有一块平地，是生火的好地方。

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You all have a sense of what a flat space is, Euclidean space is.

大家都多少知道平面空间是什麽，就是欧几里德空间。

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In this paper, the authors discuss the submanifolds with constant scalar curvature in a locally symmetric and conformally flat space, and obtain some intrinsic rigidity theorems.

该文研究了局部对称共形平坦空间中具有常数量曲率的紧致子流形，证明了这类子流形的某些内蕴刚性定理。

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One of these classrooms in this building in another classrooms again is flat classrooms with thirteen tables and a lot of nice space between them.

这栋楼里的一间教室,是另外一种教室,有13张桌子的扁平型教室,之间还有足够的空间。

麻省理工公开课 - 媒体、教育、市场课程节选

It also confirms that the proportions of normal matter to dark matter to dark energy are exactly what is needed to make space flat, rather than curved.

ECONOMIST: Astronomy

Although cleared by one court - held under sharia or Islamic law - in the nearby emirate of Ras-al-Khaimah, she has been tried for a second time, under civil law, on charges of possessing 50g cocaine found hidden in the roof space of her flat.

BBC: Stewardess's drugs trial ends

The U.S. Navy, which uses Bubble Wrap to protect everything from jet parts to navigational equipment, likes the flat sheets because they occupy less space on its transport ships.

FORBES: Magazine Article