Sometimes the player dreamed it was a miner, on the surface of a world that was flat, and infinite.

有时这个玩家梦见它是一个在一个平的，无限延展的世界表面上的矿工。

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The flare was presumably caused by sunlight glinting from some flat surface on the shuttle-shaped spacecraft, but no one can say for sure because it is a classified mission.

闪耀的现象可能是阳光照在梭状太空船的某些平整表面造成的，但也不能肯定。因为这是军事机密。

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What if all you needed to tap, swipe and type on was a flat surface and projected light?

FORBES: Meet The Projector That Could Put The iPhone's Screen On Your Desk

The projection provided a solution to a puzzle that had troubled mapmakers since the world was recognized as a sphere: How does one represent the curved surface of the globe on a flat chart?

WSJ: Lost in Our Maps: A History of Cartographic Catastrophes

They'd balance a spoon-shaped piece of magnetic rock on any flat surface, and since it was magnetic, the handle would swivel to align itself with the Earth's magnetic poles.

FORBES: Magazine Article