那么，我们是怎么得知灰白女士是拉文克劳的常驻幽灵的呢？

So how do we know that the Grey Lady is the Ravenclaw ghost?

youdao

那么，我们是怎么得知灰白女士是拉文克劳的常驻幽灵的呢？

So how do we know that the Grey Lady is the Ravenclaw ghost?

youdao