備品；備用配件
例句
1.
When NASA built Atlantis, they decided to make a complete set of spare parts, with the idea that if any shuttle was damaged, it could easily be repaired.
NASA當初在建造亞特蘭蒂斯號時，同時決定打造壹整套的備用配件，他們考慮到如果飛船損壞的話，這樣維修起來很方便。
2.
Will you supply spare parts if we want them?
如果我們需要零部件配件，妳們能提供嗎？