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
He pulled over to change the flat tire with the spare tire from the trunk.
他靠边停车，用后备箱里的备胎更换了漏气的轮胎。
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
