A child of four years that can read is forward for his age.
四岁的孩子能读书，以其年龄而论是早熟的。
He recollects drawing pictures from about the age of three or four years old.
他回忆起自己大约在三或四岁就开始绘画了。
The average age of the children was four years and ten months.
幼儿平均年龄为四岁十个月。
The average age of the children was four years and ten months.
幼儿平均年龄为四岁十个月。
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