It's really an entry into the other world, and you gonna step through it and become a part of the other world which not necessarily you can see it.

就是进入另一个世界的入口，你可以穿过这扇门,成为这个世界的一部分,而你本来可能不那么轻易获得的。

普林斯顿公开课 - 人性课程节选

Why is it that we're never observing this, for example, why is it the table doesn't diffract as we bring it through the door?

那么为什么我们,从来观察不到它呢，举个例子，搬动一个桌子穿过门,它为什么不衍射呢？

麻省理工公开课 - 化学原理课程节选