He works quickly and with an air of extreme concentration.

Nevertheless, Tables 3 and 4 indicate a more extreme concentration than these other measures would suggest.

An artist at his easel, he operates out of extreme concentration.

At the same time, it is work of extreme concentration and the sounds that are there in the music are rich with information.

Reasoning that once would have been child's play to him now required extreme concentration or was simply beyond his ability.

Lynn's work also focuses on the effects of extreme concentration of political economic power.

He closed his eyes and sniffed, with extreme concentration.

The smith's face creased into an expression of extreme concentration, and he muttered a single word.

The mood in the bodega-turned-sports-venue was one of extreme concentration.

Yet it is complex enough to demand extreme concentration, trying always to be in the right place.