The main concentration of ethnic minorities is in the town.

Below me on the field was what seemed to be the main concentration of troops.

There are two main concentrations of the program: classes and performances.

"Our main concentration from this point on is to try to take them one game at a time."

But my main concentration was to get in a good hurdles race.

From the beginning, the main concentration of the company has been nuclear medicine.

The main concentration is on the period 1870 until the present.

Besides the main concentration on sociology, he has studied business and development studies.

The main concentration continued to be upon Medusa for the moment.

He then resigned as coach in 1973 because his main concentration was on business instead of coaching.