单词open universe
网络: 开放宇宙；开宇宙；开放的宇宙
The size of an open universe is infinite and its geometry will be similar to a hyperbolic surface.
开放宇宙是无限大的，而它的几何特性和双曲面相似。
And a density parameter between 0 and 1 would mean an open universe that would continue expanding forever.
密度系数在0和1之间，说明宇宙是开放的，将会永远膨胀下去。