4岁幼儿
Matt already made his first rounds as a four year old. Mat四岁时已经开始第一次骑行。
Alice is a little girl,about four years old. 爱丽丝是一位四岁左右的小姑娘。
This is my dog. She is four years old. 这是我的狗，她四岁了。
I was four years old when the Marine left Haiti. 美国海军离开海地的时候,我四岁。
He was adopted when he was four years old. 他在四岁的时候被收养。
