You know, my car is just half a year old and also good brand.

你知道的，我的车才买了半年，还是名牌。

youdao

OBJECTIVE to summarize the experience of CPB on 173 cases of little infants (less than half a year old) undergoing open heart surgery so as to improve the success rate of the operation.

目的总结173例半岁内婴儿心内直视手术的体外循环(CPB)经验，提高小婴儿心内直视手术的成功率。

youdao

A thirty-nine-year-old competitor collapsed half-way through the marathon.

一位39岁的参赛者在马拉松赛跑的中途瘫倒了。

《柯林斯英汉双解大词典》

Helen was their first child. Until she was a year-and-one-half old, Helen Keller was just like any other child.

VOA: special.2009.11.08

The two-and-a-half year-old company was a finalist in the 2011 ImagineH2O Competition.

FORBES: Company Aims to Desalinate Fracking Water, a $1.6 Billion Market

The three and a half year old privately held Yihaodian sells over 180, 000 products on line, and has a strong market share in the online grocery market.

FORBES: Wal-Mart Expanding In China, Possibly Returning To Russia

Things like that, (unintelligible) outfits and then, particularly, my four-and-a-half year-old is looking for a Nintendo DS Lite.

NPR: Low Dollar Draws European Shoppers to U.S.