The center of Lebanon has changed little in the past century.

Many centers are changing from film to using computers for digital pictures.

"The center changed my life; without it, I'd be in a bar, or dead," he said.

An hour later, the 33-year-old center changed his mind.

Yet another factor is that political centers of gravity have changed.

The whole center of gravity has changed, to the Democrats' advantage.

They were doubling their tracks, wondering as red centers changed back to green.

The noise area expanded but its center did not change.

Thrown away from it, the centers of their orbits changed.

He was unconscious of the fact that his own center of interest had changed completely in the last few hours.