expression作表情可數(shù)嗎

　　例句：

　　This expression is used mainly in speech, not in writing.

　　這種表達(dá)主要用于口語，而不是書面語。

　　Try to put a little more expression into it!

　　盡量注入更多的感情！

　　Freedom of expression is a basic human right.

　　言論自由是基本的人權(quán)。

　　The expression in her eyes told me something was wrong.

　　她的眼神告訴我出事了。