He could see her face, though, and its expression revealed to him that she wasn't happy.

Physical expressions reveal many things about the person using them.

His expression didn't reveal anything as he stared into the camera.

The girl was pale and intense, her expression revealing nothing.

And Casey's expression revealed that he was wondering the same thing.

His expression revealed him in a way quite foreign to other Vulcans.

Molly looked away, afraid her expression might reveal how pleased she was.

Seranis was gone for many minutes, but her expression revealed nothing when she returned.

However, her expression also reveals that she isn't quite over her either.

His expression revealed little as Crispin spoke, but that night was difficult for both of them.