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.
他听见一声响,一个发光的东西直往天上冲, 冲过了屋顶在 半空 中不见了.
来自汉英文学 - 家（1-26） - 家（1-26）
5. The meeting was a dud as far as new business was concerned.
