The expression in her eyes told me something was wrong.
她的眼神告訴我出事了。
His face took on a set expression.
他臉上現出凝滯的神態。
The expression on his face never changed.
他的面部表情總是一成不變。
His expression changed from surprise to one of amusement.
他的神情由驚變喜。
There was a worried expression on her face.
她臉上流露出擔心的神色。