劍橋詞典 dumbbell noun [C] (WEIGHT) a short bar with a weight on each end that you lift up and down to make your arm and shoulder muscles stronger 啞鈴 比較barbell dumbbell noun [C] (PERSON) US a stupid or silly person 蠢人，傻瓜 同義詞dummy noun (STUPID PERSON) 返回 dumbbell