She could not let any of these thoughts interfere with her concentration.

She did nothing to interfere with her opponent's concentration.

The pain in his head kept interfering with his concentration.

He shifted on the couch, determined not to let them interfere with his concentration.

It interferes with Gilliam's concentration, his ability to call a good trance.

That kind of presence could only make the staff nervous and interfere with their concentration.

And the alarm: Was the alarm interfering with his concentration?

Droog knew she was genuinely interested and would not interfere with his concentration.

"It's rare for anything or anyone to interfere with my concentration."

It took him a while; his excitement was interfering with his concentration.