The sunshine outside is warm, the room is cool, relaxed and free.

There is a sea of people outside, and there is a person inside.

It's lush outside and black and white inside.

There are many white buildings outside the house, and the electrical appliances in the house are arranged neatly.

It's a big world outside, and an acre of land is divided into three parts inside.

Someone is knocking at the door outside, someone is getting up inside,

Someone outside yearns for it, and someone inside comes in.