/dʌd; dʌd/
n (infml 口) thing or person that fails to work properly 无用的物或人; 废物
*Two of the fireworks in the box were duds. 盒子里的烟火有两个是坏的.
* The new manager is a complete dud. 新经理完全是个废物.
* This battery is a dud. 这电池是废的.

adj defective; worthless 有缺点的; 不完善的; 无价值的; 无用的
* a dud cheque, ie one that is forged or not backed by cash 无用的支票（假支票或空头支票）.

n[C]
something that is useless, especially because it does not work correctly
　Several of the fireworks were duds.
duds [plural]informal
clothes
>dudadj
　a dud light bulb