Judging by the girl's stunned expression, even this homey room was far outside her experience.
She was trying to tell him something- something important, judging by her expression.
Judging by his wretched expression, he had broken it perhaps in more places than one.
Judging by their expression, it would take time and more talk before these two were pacified.
A robot should know how to approach a human, judging by their facial expression and body language.
Judging by his expression, he still wasn't thinking very much about it in that way.
Judging by his expression, she could imagine what he was thinking: Yeah, whatever you say.
Judging by his expression, the prospect didn't sit well with him.
And judging by the young man's expression, he wasn't happy about something.
Judging by the man's expression and gestures, he was extremely upset.