Does this mean space is shaped like a flat plane, a sphere or a saddle?

是不是这就意味着宇宙的形状就是平面、封闭球体或者马鞍状？

youdao

In a negative curvature model, two lines that would be parallel on a flat plane will extend away from each other.

在负曲率模型下，平面上平行的两条线可能彼此远离。

youdao

A sphere cannot be represented on a flat plane without distortion, which means all map projections distort in one way or another.

球体在平面上不进行扭曲就无法表现出来，这意味着所有制图方式都会以某种方式出现扭曲。

youdao

One way of speeding things up would be to make chips in three dimensions, rather than on a flat plane as they are today.

ECONOMIST: REPORTS

He said it was lucky that the plane landed flat in shallow water rather than nosediving or hitting deep water where it could have quickly been submerged.

NPR: Investigators Probe Lion Air Crash In Bali

For the first time in the airline's history, business class saw higher percentages of seats filled than coach, said Singapore spokesman James Boyd, so the airline switched to a luxurious all-business-class configuration, with 100 lie-flat beds on a plane big enough to carry more than 300 passengers.

WSJ: The World's Longest Flight, in Coach