fifteen没有缩写。
n. 十五十五个十五人组成的橄榄球队
adj. 十五的
num. 十五Let's meet at fifteen thirty.
15点30分咱们碰面。
There are fifteen students in my class.
我的班上有十五个学生。
Fifteen of us sailors were killed in the storm.
Fifteen minutes is not enough time. I need more time.
十五分钟不够,我需要更多时间。
We need another fifteen sets of utensils for the dinner party.
晚餐会还需要15套餐具。