However, it is also accessible to people involved in deep concentration for long.

After an hour of deep concentration, he called his staff together.

"I go into deep concentration before a race," he explained.

She had seen that haunted look of deep concentration too many times not to recognize it.

He bit his lower lip in deep concentration and study.

Then they went perfectly still, each absorbed in deep concentration.

Inside the shell his eyes were closed with a look of deep concentration.

He closed his eyes and looked to be in deep concentration.

She began the deep concentration that such powerful magic demanded.

Before it on a tiny raised platform sat a man in deep concentration.