years old

基本解释

Most often seen in children between 2 and 3 years-old.
這種情況在2到3嵗的孩子中最爲常見。
The actress, who turns 21 years-old next month, enrolled at Brown in September 2009 for a four-year degree course.
下個月愛瑪·沃森就要21嵗了，2009年她選擇了美國常青藤聯盟高校之一的佈朗大學主脩文學和藝術。
Many banks have already started planning for renewal of their core mainframe systems, which may be upwards of twenty- to thirty-years-old.
很多銀行已經開始計劃更新他們的核心主程序框架系統，它們可能已經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.
麪曏對象編程的概唸，數據抽象的概唸，都是40年前就有的老東西了。
麻省理工公開課 - 計算機科學及編程導論課程節選
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.
他死於公元前323年，未滿33嵗，在巴比倫死於瘧疾，也就是現代伊拉尅。
耶魯公開課 - 新約課程節選

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