sixteen-year-olds sixteen-year-old children 十六岁的孩子
A six year old children 一个六岁的孩子
A ten year old children 一个十岁的孩子
One famous experiment in the 1960s involved 3- to 6-year-old children.
20世纪60年代，在3到6岁的儿童中开展了一项著名实验。
In a study, researchers gave three groups of six-year-old children a difficult task to complete on a computer.
在一项研究中，研究人员给三组六岁的儿童安排了一项困难的任务，让他们在电脑上完成。
A new study has found that most three-year-old children can remember a lot of what happened to them a year earlier, and these memories are still clear while they are 5 and 6, but by the time they are over 7, these memories become weaker rapidly.
一项新的研究发现，大多数三岁的孩子都能记得很多一年前发生在他们身上的事情，在他们5岁到6岁的时候，这些记忆仍然清晰，但当他们超过7岁时，这些记忆就会迅速变弱。
At first, nineteen-year-old Kevin Schumann easily avoided large, inflatable dolls thrown in front of the car to represent children.
VOA: special.2010.07.01
By next April,he says, all H.I.V.-infected children less than one year old will receive treatment.
VOA: special.2009.12.02
(SAYING) Sixteen-year-old Mota, like many of the school children who live in the village, came to help visitors clean.
VOA: standard.2010.04.01
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