1. Their observable universe also used to be the size of a grapefruit. 而他们的可见宇宙也曾经只有葡萄柚般的大小。
2. The diagram below shows the hidden and observable states in the weather example. 下图展示了在天气的例子中的隐状态以及可观察状态。
3. Spacetime also appears to have a simply connected topology, at least on the length-scale of the observable universe. 时空似乎也有一个简单连接的拓扑结构,至少的长度,规模之大可见的宇宙。