Spare tire
01
备胎, 备用轮胎
an extra tire kept in a vehicle for use in case one of the main tires becomes flat or damaged
例子
The rental car came equipped with a compact spare tire for emergencies.
租赁汽车配备了一个紧凑的备用轮胎以备紧急情况使用。
02
备用轮胎, 腰间赘肉
a large excess of fat in the middle part of someone's body
Humorous
