He was vamping his worn-out shoes with duct tape to make them wearable a bit longer.

### 解释 vamping 是动词 vamp 的现在分词形式。vamp 原指"修补鞋子的前部"，后来引申为"临时修补、凑合修理"的意思，通常指用简单材料快速修理物品使其能继续使用。