儿子: Mother, the Christmas tree has been decorated.

妈妈，圣诞树装饰好了。

妈妈: Oh, well done.

噢。做得真好。

儿子: Why do we put a tree in our house during the Christmas?

为什么圣诞节的时候我们要在家里放一棵树呢?

妈妈: It’s a tradition, sweetheart.

这是个传统，甜心。

儿子: How does this tradition come from?

这个传统是怎么来的?

妈妈: It comes from long, long ago. You can try to find out the answer by yourself.

很久很久以前来的，你可以试着自己去找找答案。

儿子: Where can I search?

我能在哪里找呢?

妈妈: The Internet and the books, and there are many book on this subject.

网络或者书啊，有很多关于这方面的书。