there are three of us in my famil与there are three of us in the family 的区别

there are three people in my family.

there are three children in my family.

there are three people in my family.

there are three children in my family.
你那两句一个是my family
一个是the family，
我的家庭和这个家庭（特指）。

there are three of us in my famil 我们家有三口人

there are three children in my famil 我们家有三个孩子