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。

youdao

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。

youdao

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。

youdao