He opened the window to let fresh air into the room.

The view from the airplane window is very beautiful.

She put a vase on the windowsill.

We looked at the sea from the window in the small boat with a thatch roof.

From the mugwort window of my room, a landscape of fresh green mugwort spreads out.

There are two windows in this room.

I am very interested in natural science.

Natural numbers start from 0 and continue as 1, 2, 3, 4, 5, 6, 7, 8, 9.

Natural selection plays an important role in the evolution of organisms.

I was moved by the beauty of nature.