His face showed strong concentration as he looked up and saw the two come in.

On the other hand, some places showed startling concentrations.

Clemens, without showing the least emotion or special concentration of interest, said quietly: "I will."

The Incarnation had been listening in silence, his face showing concentration but no emotion.

Subsequent soil tests showed high concentrations of the poison around the trees, which are not expected to survive.

The samples confirmed the theory, as the skeletons showed extremely high concentrations of lead.

Her face showed more concentration than fear as her finger tightened on the trigger.

The surveys showed high concentrations in a large swath running north to south through the city, just skirting downtown.

Surveys conducted in 2000 showed high concentration of krill around Bouvetøya.