十五;业余英式橄榄球队;
例句:
In its heyday , the company ran trains every fifteen minutes.
公司在最兴隆时期每隔十五分钟就开出一列火车。
Fifteen students in the class are girls and the remainder are boys.
班里有15名女学生,其余是男生.
Fifteen minutes later he was undressed and in bed.
15分钟后他便穿了睡衣躺在床上了。