know-it-all編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看know-it-allknow-it-all — 名詞名詞1. a person who acts as if they know everything1.名詞釋義萬事通a person who acts as if they know everything例句He's such a know-it-all; nobody wants to work with him.