这部电影是我看过最无聊的一部。

This movie is the ___dullest one I've ever watched.

这件灰色毛衣是所有颜色中最暗淡的。

This gray sweater is the ___dullest of all the colors.

尽管老师反复解释，这个最迟钝的孩子还是没能理解这个简单的概念。

Even after repeated explanations, the ___dullest child in the group still couldn't grasp the simple concept.