研究者说对称的，各向同性的宇宙应该是形成于一个球对称的大爆炸中。
The researchers say that the symmetric and isotropic universe should have formed from a spherically symmetric explosion.
认为在宇宙尺度上，任何时刻，三维空间是均匀的和各向同性的。
That the scales in the universe, at any time, three-dimensional space is homogeneous and isotropic.
微波背景辐射显示的宇宙高度的均匀性和各向同性说明，宇宙已经存在了约150亿年左右。
The high homogeneity and isotropy shown in the cosmic microwave background (CMB) prove that the universe has been in existence for around 15 billion years.
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