But, my room was too busy, and I wanted to concentrate by myself.

They learn best when allowed to concentrate on the subject by themselves.

"But I'm sure that my device will be able to concentrate the strength of radiation by electromagnetic action," he said to himself.

Thus it would concentrate mostly in one bay or another, by the time it struck the bottom.

He would concentrate on the downstairs areas, room by room.

The Carthaginians concentrated on the men by the river instead.

These mass differences are used to concentrate uranium-235 by diffusion or centrifugation.

We concentrated on a submerged ledge by the closer island.

Most Republicans want to concentrate on illegal activities by executive branch officials in the 1996 election.

She concentrates on this job and reports by telephone or sees me at night.