- dud
 - [dʌd]
 - n. 衣服;哑弹;无用物
adj. 无用的 
参考例子
           - 1.The crucial round is a dud.
 - 至关重要的炮弹总是哑弹。
 
- 2."It's a dud, I guess, " said the goose.
 - “我猜想这是个孵不出小鹅的蛋。”母鹅说。
 
- 3.How can we be expected to carry out our jobs with the dud equipment you gave us?
 - 你怎么能指望我们用这些给你的烂设备来完成工作呢?
 
英文解释
           - n.
 - 1.someone who is unsuccessful
 - 2.an explosion that fails to occur
 - 3.an event that fails badly or is totally ineffectual
 
- adj.
 - 1.failing to detonate; especially not charged with an active explosive
 
网络释义
               - dud
 - 衣服; 不发弹; 哑弹; 未爆弹;
 
- nuclear dud
 - 未爆核弹; 核哑弹; 未爆炸核弹;
 
- Dud torpedoes
 - (鱼雷哑弹):选择后,鱼雷将偶尔出现故障。失灵的鱼雷会提前爆炸或者完全不炸。;
 
- flare dud
 - 失效爆炸(核弹); 爆炸的无效弹;
 
- dwarf dud
 - 非完全哑核弹;