An expanding universe, like ours, that comes from a big bang does not have such a well-behaved boundary.
An expanding universe, like ours, that comes from a big bang does not have such a well-behaved boundary.
一个因为大霹雳而膨胀的宇宙，例如我们这个宇宙，并没有性质如此好的边界。
An expanding universe, like ours, that comes from a big bang does not have such a well-behaved boundary.
一个因为大霹雳而膨胀的宇宙，例如我们这个宇宙，并没有性质如此好的边界。