he was so dull at parties; a dull political campaign; a large dull impassive man; dull days with nothing to do; how dull and dreary the world is; fell back into one of her dull moods是什么意思_he was so dull at parties; a dull political campaign; a large dull impassive man; dull days with nothing to do; how dull and dreary the world is; fell back into one of her dull moods在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句