He had a concentrated expression on his face, as if he were smiling and frowning at the same time.

There was a jangling excitement to the place, and the doctors wore the concentrated expressions of combat.

She bent over the dough with a concentrated expression, her underlip tucked in.

He looked at Yuan, at the intent, glittering eyes, the concentrated expression.

Their reaction to Alger Hiss was the concentrated expression of that sentiment.

Its most concentrated expression can be found in pop music.

Outside a mad woman was talking to herself: she wore several coats and had a troubled, concentrated expression.

As the concentrated expression returned to his forehead, he seemed to become conscious that it was in hers too.

I seemed to see her face before me, that troubled, slightly concentrated expression she so often wore.

He had a serious concentrated expression on his face, as if he were listening to something.