I concentrate on work when I am at the office.

We focus on solving the problem.

I wonder if they concentrate enough on their tasks.

Do you concentrate on your goal every day?

Let's focus on the solution, not on the problem.

The circles overlap concentrically.

The concentricity of the circles is important for precision.

Concentric circles have the same center.

This concentric circle represents the protected area of the city.

The concentric circles overlap perfectly.