years old

基本解释

Most often seen in children between 2 and 3 years-old.
这种情况在2到3岁的孩子中最为常见。
The actress, who turns 21 years-old next month, enrolled at Brown in September 2009 for a four-year degree course.
下个月爱玛·沃森就要21岁了，2009年她选择了美国常青藤联盟高校之一的布朗大学主修文学和艺术。
Many banks have already started planning for renewal of their core mainframe systems, which may be upwards of twenty- to thirty-years-old.
很多银行已经开始计划更新他们的核心主程序框架系统，它们可能已经使用了二十到三十年。

Roosevelt was forty-two years old -- the youngest man ever to hold the office of president of the United States.
Now these ideas of classes, object-oriented programming, data abstraction, are about 40 years old, they're not new ideas.
面向对象编程的概念，数据抽象的概念，都是40年前就有的老东西了。
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He died in 323, when he was not yet 33-years-old, and he died in Babylon of a fever, that is, of course, modern day Iraq.
他死于公元前323年，未满33岁，在巴比伦死于疟疾，也就是现代伊拉克。
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It's actually liberating compared to Windows Phone 7's fixed tile sizes and years-old web code.
ENGADGET: IRL: Epson R1800, Babbel for iPad and the Nokia Lumia 920 on Rogers