1. Most of the violence in Afghanistan has been concentrated in the east and the south.

2. For this tour I concentrated on the Air and Space hall.

3. Though I concentrated on the Air and Space Hall, the larger museum is cool too.

4. The robot would have to dive closer to the seafloor for a concentrated survey of the target area.

5. The awards were concentrated among a handful of winners.

6. Rather, it was concentrated more heavily in some regions than others, they said.

7. The power is enormously concentrated in Russia, he said.

8. The costs are concentrated and salient.