fifteenth lap错漏百出
Fifteenth Plan十五计划
the fifteenth第十五;有心上人了
Fifteenth day第十五天
fifteenth March三月十五号
fifteenth penedereheoan听
Fifteenth Amendment第十五条修正案
January fifteenth一月第十五日;一月第十五
fifteenth shmily第十五章
ORD（序数词） The fifteenth item in a series is the one that you count as number fifteen. 第15
...the invention of the printing press in the fifteenth century.
…15世纪印刷机的发明。