dud

The dud firework didn't explode, so the children were disappointed.

这个哑火的烟花没有爆炸，所以孩子们很失望。

用法提示：dud作前置形容词修饰firework，表示烟花未能引爆。

Farmers often find dud shells in their fields after the war ended.

战争结束后，农民们经常在田里发现未爆的炮弹。

用法提示：dud作定语修饰shells，指未爆炸的炮弹。

The bomb disposal robot picked up the dud bomb and moved it to a safe place.

拆弹机器人把那枚未爆炸的炸弹搬到安全的地方。

用法提示：dud同样修饰bomb，表示炸弹未引爆，此处作定语。