c. 1825, "person in ragged clothing," from duds (q.v.). Sense extended by 1897 to "counterfeit thing," and 1908 to "useless, inefficient person or thing." This led naturally in World War I to "shell which fails to explode," and thence to "expensive failure."
实用例句
1. He replaced a dud valve.
他换掉了坏阀门。来自柯林斯例句
2. The mine was a dud.
矿井废弃了。来自柯林斯例句
3. The new manager is a complete dud.
新经理完全是个废物.来自辞典例句
4. A fiery ball shot up over the rooftops, where it disappeared in mid - air -- a dud.
