We provide a 5-year guarantee against rust.

我们保证5年不生锈。

《牛津词典》

I have a 7-year-old daughter, and a 5-year-old son.

我有一个7岁的女儿和一个5岁的儿子。

youdao

I went to see it with my 5-year-old son last Sunday afternoon.

上个星期天下午，我和我5岁的儿子去看了它。

youdao

And finally, the 10th news story of the year was the 5-day war between Russia and Georgia.

VOA: special.2009.01.03

You look at the returns that are reported for hedge funds in aggregate--they're generally 12%,13%,14% per year for the last five or ten years.

看一下过去5到10年间,公报中的对冲基金年平均收益率,普遍来说是12%,13%,14%

耶鲁公开课 - 金融市场课程节选

In another year, however, the stock market lost 5% and Shiller, Inc. Lost 7%.

另一年,股票市场下跌了5%,希勒公司.下跌了7%

耶鲁公开课 - 金融市场课程节选