The talks began some fifteen minutes late.

　　商談遲了約十五分鐘才開始。

　　We paid off our mortgage after fifteen years.

　　我們歷經十五年的時間還清了抵押借款。

　　Bob spent fifteen months alone on his yacht. Ann, meanwhile, took care of the children on her own.

　　鮑勃獨自在他的游艇上待了十五個月。在這段時間，安一個人照顧孩子。

　　In its heyday , the company ran trains every fifteen minutes.

　　公司在最興隆時期每隔十五分鐘就開出一列火車。