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 these the needles are arranged parallel to each other in a flat plane.

在横机上，针在一个平面上平行排列。

youdao

The up and down keys will move the camera along a flat plane so that it stays at the same altitude.

上下键是在一个平面上移动摄像机，它始终在一个高度上。

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

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