fifteenth
adj. 第十五的；十五分之一的
num. 第十五
复数 fifteenths
例句
He received a car on his fifteenth birthday.
他在十五岁生日时收到了一辆车。
He got two birthday cakes on his fifteenth birthday.
他十五岁生日时得到了两个生日蛋糕。
The writer got new potatoes on the fifteenth day of the experiment.
作者在实验的第十五天获得了新土豆。
