You can use family to describe things that belong to a particular family.
He returned to the family home.
他回到了自己家。
You can use family to describe things that are designed to be used or enjoyed by both parents and children.
It had been designed as a family house.
它已被设计成一幢适合全家人居住的房子。
families
A family is a group of people who are related to each other, especially parents and their children.
There's room in there for a family of five.
那儿能住得下一家5口。
Does he have any family?
他有什么家人吗?
When people talk about a family, they sometimes mean children.
They decided to start a family.
他们决定了要孩子。
When people talk about their family, they sometimes mean their ancestors.
Her family came to Los Angeles at the turn of the century.
她的祖先在世纪之交时来到了洛杉矶。
A family of animals or plants is a group of related species.
foods in the cabbage family, such as Brussels sprouts.
十字花科食物,如抱子甘蓝。