His principal focus has been on the connections between Russian literature and music.

But my principal focus became the effects of environmental factors on our health.

But the principal focus for freight traffic was the goods station.

A. The principal focus of our work is documentation.

Since 2003, however, composition has become a principal focus of his career.

His principal focus during his tenure was the war effort.

Language was a principal focus of legislation at the state and local level.

Block 2 was the principal focus of the German assault.

It makes the hypothesis that unity between Christians should be a principal focus for the way ahead.

At the White House the drought has become a principal focus of activities this week.