The dense concentration of troubled families in overcrowded rooms has only made things worse.

Some critics said it would be necessary to tear down the tower, to provide sufficient space and sunlight amid the dense concentration of towers.

It may be found in dense concentrations or singly.

But they work in two populous states with dense concentrations of managed-care companies, Florida and California.

A good captain always watches for dense concentrations of gases.

Its name is derived from the dense concentration of large Catholic churches that dominate the area's architecture.

Puna's coastal areas have relatively dense concentrations of historical, cultural, and burial sites.

In the predawn, it is almost as if the emotion has been boiled down to its most dense concentration.

Plants tend to be very localized in dense concentrations due to the seeds large size and heavy weight.

A rich diversity of microbial life inhabit soda lakes, often in dense concentrations.