dud

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++dud /dʌd/ noun [countable]  1  USELESSsomething that is useless, especially because it does not work correctly 无用的东西，废物 Several of the fireworks were duds. 烟火中有几个是哑炮。2. duds [plural] informalDCC clothes 衣服 —dud adjective a dud light bulb 坏灯泡

Examples from the Corpus

dud• Critics have labeled the new telescope a dud.• I've learnt about 60 I suppose overall and half of them are duds naughty words or words for something completely different.• Pauley's last performance was a major dud.• There were no duds among the three 1992 Piedmont wines I tried.• There are a couple of duds on Double Good Everything but there's also a sharper sense of purpose.• Even with the advantages of other income sources, studios depend on a few hits to pay for a large number of duds.From Longman Business Dictionaryduddud /dʌd/ noun [countable] informal something that is useless or of bad quality, especially because it does not work correctlyThe new system turned out to be a market dud. —dud adjectivedud results from biotech companies

dud nounChinese  

work it is especially correctly Corpus because something does not that useless, Business

dud
dud /dʌd/ noun [countable]
1. something that is useless, especially because it does not work correctly:
    Several of the fireworks were duds.
2. duds [plural] informal clothes
—dud adjective:
    a dud light bulb