It must be to everybody, even to the dullest mind.

这一定是每个人都明了的，即使是最愚钝的人。

It's quite possibly the dullest video we have seen.

它很可能是最枯燥乏味的视频，我们已经看到。

Unfortunately,the show was one of teh dullest we have ever seen.

不幸的是，这次演出是我们看过的最乏味的演出了。

Unfortunately, the show was one of the dullest we have ever seen.

不幸得很，这次演出是我们所看过的最乏味的演出。