Each car should have a spare tyre.

每辆车都应有个备用轮胎。

I need a spare tyre for the tractor.

这辆拖拉机我还需要一个备胎。

Have you got a spare tyre in your car?

你的汽车上有备用轮胎吗？

Take a spare tyre along in case of need.

带只备用轮胎去，以备不时之需。

Every one of those cars has a spare tyre.

所有那些汽车都有一个备用轮胎。