Sparel斯帕雷尔spareadj.备用的；多余的；闲置的v.抽出；饶恕；赦免；节约n.备用品；剩余spare equipment备用设备spares inventory备件库存spare one's lifespare track link备用履带节spare allocation剩余分配spare parts pool航材共享库spare occupation兼职的工作spare-crucible制备坩埚spare me an hour为我抽出一小时spare controller备用调节器, 备用控制器

1. We have a duplicate key to the front door.
   我们有前门的备用钥匙。
2. He said his wife had the spare keys.
   他说他的妻子带着备用钥匙。