His family moved to Texas when he was only three months old.

VOA: special.2010.03.17

This thing this new invention is three months old at this point.

在此刻，这一新的发明却,已经有三个月的历史了。

耶鲁公开课 - 金融市场课程节选

One group is those who are six months to four years old.

VOA: special.2009.08.05

EJ Davis,4,was only three-months-old when he underwent open heart surgery.

VOA: standard.2010.01.01

But I was eight years old and I was terrified. I think it took me like two months to go off it with the full speed and actually go anywhere,"

VOA: standard.2010.01.31