dud是什么意思？

dud

英[dʌd] 美[dʌd]

• n. [军]哑弹，无用的人或物，衣服，个人物品；
• adj. 无用的，不完善的；

复数：duds;

例句

• The new manager is a complete dud. 新经理完全是个废物.
• The mine was a dud. 矿井废弃了。
• He replaced a dud valve. 他换掉了坏阀门。

柯林斯高阶英汉双解学习词典释义

• ADJ
  不中用的;失灵的;出故障的
  Dud means not working properly or not successful.
  例句
  He replaced a dud valve. 他换掉了坏阀门。

英英词典释义

• Noun
  1. someone who is unsuccessful
  2. an explosion that fails to occur
  3. an event that fails badly or is totally ineffectual;
  "the first experiment was a real turkey""the meeting was a dud as far as new business was concerned"
• Adjective
  1. failing to detonate; especially not charged with an active explosive;
  "he stepped on a dud mine"

行业词典

• 体育： 不发弹；
  航天： 瞎火；