Sam is five years old.

萨姆五岁了。

My son is five years old.

我的儿子五岁了。

We've been friends for five years.

我们已经是朋友五年了。

Five years ago, he walked to school.

五年前，他步行去上学。

It only blooms once every five years.

“它每五年只开一次花。”

They returned with the grown tortoises five years later.

五年后，他们带着长大的龟回来了。

He started his musical training when he was five years old.

他五岁时开始接受音乐训练。

Five years ago, I didn't go swimming but I used to play football every day.

五年前，我不去游泳，但我每天都踢足球。

He taught Chinese at a college in London and returned to China five years later.

他在伦敦的一所大学教授中文，五年后回到中国。

Many children started work in factories when they were only four or five years old.

许多孩子在四五岁时就开始在工厂工作。