It's an area with a heavy concentration of electronics companies.

It did not take the French batteries long to lay an extremely heavy concentration on the cut.

But I want the heaviest concentration in front of the gates.

"Then they began to appear on the other fields in heavier concentrations," he said.

One showed where Arab migrants live in particularly heavy concentrations.

He wondered if it were deliberate to prevent too heavy a concentration from any one sun system.

The brown tide is indeed back, but not where it had previously been found in heavy concentrations.

But for heavy concentrations of mold, you will have to take more precautions.

This becomes particularly important where there is a heavy concentration of media ownership.

Her face was tired and drawn in lines of heavy concentration.