expression作为表情可数吗

　　The expression in her eyes told me something was wrong.

　　她的眼神告诉我出事了。

　　His face took on a set expression.

　　他脸上现出凝滞的神态。

　　The expression on his face never changed.

　　他的.面部表情总是一成不变。

　　His expression changed from surprise to one of amusement.

　　他的神情由惊变喜。

　　There was a worried expression on her face.

　　她脸上流露出担心的神色。