Children don't complete their set of 20 baby teeth until they are two to three years old.

孩子到两三岁时才长齐20颗乳牙。

《柯林斯英汉双解大词典》

It's the same old story. They want one person to do three people's jobs.

又是老一套。他们想让一个人干3个人的活儿。

《柯林斯英汉双解大词典》

She had been unable to sleep for three days because of her 13-week-old son's crying.

由于她13周大的儿子的啼哭，她3天没睡着觉了。

《柯林斯英汉双解大词典》

The sixty-three year old coach has had operations to replace both of his hips and has problems with his back and knees.

VOA: special.2009.07.10

Meanwhile, his youth was going away and now this imaginary student is now thirty-three years old never had time to marry or start a normal life.

与此同时，他的青春年华也已经逝去了,现在这位设想出来的同学已经33岁了,还没有结婚也没有开始正常人的生活。

耶鲁公开课 - 金融市场课程节选

Nominees for these academies must be seventeen to twenty-three years old, unmarried and with no children.

VOA: special.2009.06.04

Ferguson paid tribute to a player whose goals have played a large part in bringing three successive titles to Old Trafford.

BBC: Ronaldo completes ?80m Real move

And the ages ranged from three to 75 years old -- we had a big family.

WHITEHOUSE: The White House

Staff have managed to catch the animal, which has been identified as a two to three year old male European Beaver.

BBC: Beaver