If we live in an emptier-than-average region of space, then the cosmic expansion rate varies with position, which could be mistaken for a variation in time, or acceleration.

• 如果我们所在的空间密度低于宇宙平均水平，那么宇宙膨胀速率随着位置而改变，于是我们得出的时间变化或者加速的结论可能是错误的。