你好，我是玛丽，我十三岁。

Hello, I'm Mary and I'm thirteen years old.

我十三岁，我上法赫德国王中学。

I'm thirteen years old and I go to King Fahd Intermediate School.

亨利十三岁。

Henry is thirteen years old.

当我十三岁时，一个女孩给了我一份重要的礼物。

When I was thirteen years old, a girl gave me an important gift.

他今年十三岁。

He is thirteen years old this year.

我十三岁了，我来自南澳大利亚。

I am thirteen years old, and I come from South Australia.

亲爱的约书亚，我写信告诉你，我现在十三岁了。

Dear Joshua, I'm writing to tell you that I am now thirteen Years old.

我十三岁。

I'm thirteen years old.

因此我十三岁。

So I am thirteen years old.

这个男孩十三岁。

This boy is thirteen years old .