Never again did he remember going at anything with such concentration.

With the concentration of population came more interest in education and culture.

The players helped each other out with concentration and hard work.

It couldn't be long, though with concentration, time seemed to stand still.

Even with such concentration, Americans still have many sources for news.

Does the answer have anything to do with the concentration of mass?

Almost for the first time he was listening with total concentration to something she said.

She could, with concentration, control her thoughts during the day.

But the issue on the field yesterday had more to do with concentration.

He was watching another television show with all the concentration of a kid.