the fact of not being interesting or exciting 枯燥无味的;沉闷的;无聊的 the dullness of modern architecture 现代建筑的沉闷
the fact of not being bright or shiny 暗沉: 不明亮或没有光泽The sky was bright, contrasting with the dullness of the bare branches reaching upwards. 天空明亮,与向上伸展的光秃秃的树枝的暗淡形成对比。
the fact of being cloudy and slightly dark 暗沉: 浑浊且稍暗Despite the dullness of the weather, she whistled all the way home. 尽管天气沉闷,她一路吹着口哨回家。