Due to the economic crisis, the company decided to reduce everyone's salary.

His salary was reduced because the company's financial situation worsened.

I found a sea hare at the beach.

A drop of water fell from the cup.

The air in this room is fresh.

What will you use this empty box for?

Looking at the bird flying high in the sky, I felt freedom.

The altitude of this airplane is 10,000 meters.

In mathematics, an empty set refers to a set that does not contain any elements.

I enjoyed a picnic under the clear sky.