There had been two great concentrations of military power on Earth.

Then he moved forward again and this time kissed her with greater concentration.

It can be used only once per operation and requires great mental concentration.

People inside the crescent experience those problems in greater concentration.

He was standing very close to her again, examining the page with great concentration.

In many ways the most powerful impetus to greater concentrations came from the state.

The dwarf stood in front of the door, his back to us, and began to work on something with great concentration.

"Are there areas in the house that have a greater concentration?"

Therefore, great concentration is required during use even from experts.

It was standing by a window, drawing with great concentration on the glass.