spare tire

US /ˈsper ˌtaɪər/
UK /ˈsper ˌtaɪər/
"spare tire" picture
1.

备胎, 备用轮胎

an extra tire carried in a vehicle, for use if another tire goes flat

:
Make sure you have a spare tire in your trunk before a long trip.
长途旅行前,请确保后备箱里有备胎
I had a flat tire, but luckily I had a spare tire to change it.
我爆胎了,但幸运的是我有一个备胎可以更换。
2.

游泳圈, 赘肉

a roll of fat around a person's waist

:
He's trying to get rid of his spare tire by exercising more.
他正通过多锻炼来减掉他的游泳圈
After the holidays, I always seem to gain a little spare tire.
假期过后,我似乎总是会多长一点游泳圈