You must return the book in fifteen days.
你必须在十五天内归还书籍。
I have fourteen roosters and fifteen hens.
我有十四只公鸡和十五只母鸡。
There are fifteen boys and nineteen girls.
男生有十五位，女生有十九位。
He did this sixteen times.
他这样做了十六次。
I have sixteen turkeys.
我有十六只火鸡。
I'm sixteen, after all.
毕竟我十六岁了。
Jenny is seventeen years old.
珍妮17岁。
He had confessed to seventeen murders.
他已供认了17项谋杀罪。
Nora thought he was seventeen years old.
诺拉觉得他有17岁。