She could control her reaction to it for the time being.

And now that he was, she couldn't control her reaction.

He controlled his reaction to the scene in front of him.

She tried to control her reaction, I saw, but the shock was extreme.

He controlled his reaction and glanced at the group in the room.

See, there's a disease that turns our power to control chemical reactions against us.

It was all Ro could do to control her reaction.

The first advantage is its ability to control reactions within the droplets.

Silence controlled her first reaction, made herself turn slowly to face the stranger.

They also form the enzymes that control chemical reactions throughout the body.