例句：Fifteen people didn’t hurt themselves in this accident.
翻譯：在這次意外中，十五個人沒有受傷。
變化
例句：We need to read fifteen books in the semester
翻譯：我們這學期必須讀十五本書
● 單數：fifteen [ˋfɪfˋtin]
● 複數：fifteens