備用鑰匙: spare keys備胎: spare tire / spare tiresspare : 備用的, 多餘的.
...on your car, we can give you some instructions to replace it with a spare tire. First, there is a tool kit in the trunk. Use the sleeve in it...
... completely flat. Jeanine opens the trunk to get the jack and the spare tire. Traffic continues to whiz by at seventy miles per hour...