Her face was filled with a look of total concentration.

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

Although it took total concentration, she was managing quite well.

If you are online with the other participants perhaps thousands of miles away, total concentration becomes possible.

And what he was doing demanded no less than total concentration.

He had a job to do, and it required his total concentration.

To meet these standards the worker needs total concentration and freedom from time pressure.

The smile left her son's face, replaced by a look of total concentration.

The way she listened with total concentration when he talked to her.

Her child slept with total concentration, as she did everything.