He left school at the age of 18.

他18岁读完中学。

《牛津词典》

He immigrated from India at age 18.

他18岁时从印度移民出来。

《柯林斯英汉双解大词典》

We usually tip 18-20%.

我们通常付18-20%的小费。

《柯林斯英汉双解大词典》

Earlier, the president noted a report which showed that Wall Street bankers got more than 18 billion dollars in bonuses last year.

VOA: special.2009.01.31

But, I give a lot of credit to the European politics of the late 17th and 18th century.

但是，我觉得很大程度上得益于欧洲政治,在17世纪末和18世纪，起的作用。

普林斯顿公开课 - 人性课程节选

And then that one's got an 18 on it, so I had it for like two years now.

然后那个上面有一个数字18，所以我拥有它两年了。

忘不了的生日礼物 - SpeakingMax英语口语达人