spare tire的用法和樣例：
例句
用作名詞 (n.)
- We had a puncture, and our spare wheel was flat.
我們的輪胎被扎破了，備用輪胎又沒充氣。 - His hands strove frantically to release the spare wheel.
他的手使儘力氣要把那隻備用輪胎取下來。 - Jane had developed a spare tyre since she stopped smoking and started eating sweets.
簡自戒煙並開始吃甜食后，她的腰圍大了許多。
