My mother had taught me to knit at 15, and I knitted in class throughout college and for a few years thereafter.

在我15岁的时候，我母亲便教我编织，于是整个大学期间我都在课堂上练习编织，之后的几年也一直如此。

youdao

I started playing darts at 15.

我从15岁开始玩掷镖游戏。

《柯林斯英汉双解大词典》

She was expelled from school at 15.

她15岁时被学校开除了。

《牛津词典》

At about fifteen thousand meters, the B-52 released the X-15.

VOA: special.2010.07.07

At 15, he went to law school.

5岁，入读法学院。

耶鲁公开课 - 公正课程节选

Well,if hedge funds first became mainstream maybe fifteen years ago, then what are you looking at in terms of history?

如果对冲基金,在15年前就变成主流,那么你会在它们的历史记录中看到什么呢

耶鲁公开课 - 金融市场课程节选

In India, traffic was growing at 15 to 25 percent annually, depending on the airport.

FORBES: India's Airport Boom Embraces Green Building

The Dow Jones industrial average closed up 21.73 points, or 0.1 percent, at 15, 324.53 points.

NPR: Stocks Rise As Lackluster Reports Ease Fed Concern

The Merrill product, in contrast, yields a pure long-term gain or loss taxed at 15%.

FORBES: Another Option